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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Language" content="en-us">
<meta name="GENERATOR" content="Microsoft FrontPage 5.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<title>The Documentation Index</title>
<meta http-equiv="Content-Language" content="en-us">
<meta name="GENERATOR" content="Microsoft FrontPage 5.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<meta http-equiv="Content-Type"
content="text/html; charset=windows-1252">
<title>The Documentation Index</title>
</head>
<body>
<body>
<h1 align="center">The Shorewall Documentation Index</h1>
<h1 align="center">has Moved
<a href="shorewall_quickstart_guide.htm#Documentation">Here</a></h1>
<p><font size="2">
Last updated 8/9/2002
-
<a href="support.htm">Tom Eastep</a></font>
</p>
<p>
<font face="Trebuchet MS"><a href="copyright.htm"><font size="2">Copyright</font>
© <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font></p>
<h1 align="center">has Moved <a
href="shorewall_quickstart_guide.htm#Documentation">Here</a></h1>
<p><font size="2"> Last updated 8/9/2002 -
<a href="support.htm">Tom Eastep</a></font> </p>
<p> <a href="copyright.htm"><font size="2">Copyright</font> © <font
size="2">2001, 2002 Thomas M. Eastep.</font></a></p>
<br>
</body>
</html>

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@ -188,9 +188,9 @@ system. The systems in the two masqueraded subnetworks can now talk to each
other</p>
<p><font size="2">Updated 8/22/2002 - <a href="support.htm">Tom
Eastep</a> </font></p>
<p><font face="Trebuchet MS"><a href="copyright.htm"><font size="2">Copyright</font>
© <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font></p>
<p><a href="copyright.htm"><font size="2">Copyright</font>
© <font size="2">2001, 2002 Thomas M. Eastep.</font></a></p>
</body>
</html>
</html>

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<p><font size="2">Last updated 10/23/2002 - </font><font size="2">
<a href="support.htm">Tom Eastep</a></font> </p>
<p><font face="Trebuchet MS"><a href="copyright.htm"><font size="2">
Copyright</font> © <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font></p>
<p><a href="copyright.htm"><font size="2">
Copyright</font> © <font size="2">2001, 2002 Thomas M. Eastep.</font></a></p>
<br>
<br>
</body>

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@ -199,8 +199,8 @@ by traffic control/shaping.</li>
<p><font size="2">Updated 10/28/2002 - <a href="support.htm">Tom Eastep</a>
</font></p>
<p><font face="Trebuchet MS"><a href="copyright.htm"><font size="2">Copyright</font>
© <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font></p>
<p><a href="copyright.htm"><font size="2">Copyright</font>
© <font size="2">2001, 2002 Thomas M. Eastep.</font></a></p>
<br>
<br>
</body>

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<html>
<head>
<title>MAC Verification</title>
<meta http-equiv="content-type"
content="text/html; charset=ISO-8859-1">
<meta name="author" content="Tom Eastep">
</head>
<body>
<table border="0" cellpadding="0" cellspacing="0"
style="border-collapse: collapse;" width="100%" id="AutoNumber4"
bgcolor="#400169" height="90">
<tbody>
<tr>
<td width="100%">
<tbody>
<tr>
<td width="100%">
<h1 align="center"><font color="#ffffff">MAC Verification</font><br>
</h1>
<br>
</td>
</tr>
</tbody>
</h1>
<br>
</td>
</tr>
</tbody>
</table>
<br>
Beginning with Shorewall version 1.3.10, all traffic from an interface
or from a subnet on an interface can be verified to originate from a defined
set of MAC addresses. Furthermore, each MAC address may be optionally associated
with one or more IP addresses. <br>
<br>
<b>You must have the iproute package (ip utility) installed to use MAC Verification
and your kernel must include MAC match support (CONFIG_IP_NF_MATCH_MAC -
module name ipt_mac.o).</b><br>
<br>
There are four components to this facility.<br>
<br>
Beginning with Shorewall version 1.3.10, all traffic from an interface
or from a subnet on an interface can be verified to originate from a defined
set of MAC addresses. Furthermore, each MAC address may be optionally
associated with one or more IP addresses. <br>
<br>
<b>You must have the iproute package (ip utility) installed to use MAC
Verification and your kernel must include MAC match support (CONFIG_IP_NF_MATCH_MAC
- module name ipt_mac.o).</b><br>
<br>
There are four components to this facility.<br>
<ol>
<li>The <b>maclist</b> interface option in <a
href="Documentation.htm#Interfaces">/etc/shorewall/interfaces</a>. When this
option is specified, all traffic arriving on the interface is subjet to MAC
<li>The <b>maclist</b> interface option in <a
href="Documentation.htm#Interfaces">/etc/shorewall/interfaces</a>. When
this option is specified, all traffic arriving on the interface is subjet
to MAC verification.</li>
<li>The <b>maclist </b>option in <a
href="Documentation.htm#Hosts">/etc/shorewall/hosts</a>. When this option
is specified for a subnet, all traffic from that subnet is subject to MAC
verification.</li>
<li>The <b>maclist </b>option in <a
href="Documentation.htm#Hosts">/etc/shorewall/hosts</a>. When this option
is specified for a subnet, all traffic from that subnet is subject to MAC
verification.</li>
<li>The /etc/shorewall/maclist file. This file is used to associate
MAC addresses with interfaces and to optionally associate IP addresses
with MAC addresses.</li>
<li>The <b>MACLIST_DISPOSITION </b>and <b>MACLIST_LOG_LEVEL </b>variables
in <a href="Documentation.htm#Conf">/etc/shorewall/shorewall.conf.</a> The
MACLIST_DISPOSITION variable has the value DROP, REJECT or ACCEPT and determines
the disposition of connection requests that fail MAC verification. The
MACLIST_LOG_LEVEL variable gives the syslogd level at which connection requests
that fail verification are to be logged. If set the the empty value (e.g.,
MACLIST_LOG_LEVEL="") then failing connection requests are not logged.<br>
</li>
<li>The /etc/shorewall/maclist file. This file is used to associate
MAC addresses with interfaces and to optionally associate IP addresses with
MAC addresses.</li>
<li>The <b>MACLIST_DISPOSITION </b>and <b>MACLIST_LOG_LEVEL </b>variables
in <a href="Documentation.htm#Conf">/etc/shorewall/shorewall.conf.</a>
The MACLIST_DISPOSITION variable has the value DROP, REJECT or ACCEPT and
determines the disposition of connection requests that fail MAC verification.
The MACLIST_LOG_LEVEL variable gives the syslogd level at which connection
requests that fail verification are to be logged. If set the the empty value
(e.g., MACLIST_LOG_LEVEL="") then failing connection requests are not logged.<br>
</li>
</ol>
The columns in /etc/shorewall/maclist are:<br>
The columns in /etc/shorewall/maclist are:<br>
<ul>
<li>INTERFACE - The name of an ethernet interface on the Shorewall
system.</li>
<li>MAC - The MAC address of a device on the ethernet segment connected
by INTERFACE. It is not necessary to use the Shorewall MAC format in this
column although you may use that format if you so choose.</li>
<li>IP Address - An optional comma-separated list of IP addresses
<li>INTERFACE - The name of an ethernet interface on the Shorewall
system.</li>
<li>MAC - The MAC address of a device on the ethernet segment connected
by INTERFACE. It is not necessary to use the Shorewall MAC format in this
column although you may use that format if you so choose.</li>
<li>IP Address - An optional comma-separated list of IP addresses
for the device whose MAC is listed in the MAC column.</li>
</ul>
<h3>Example 1: Here are my files:</h3>
<b>/etc/shorewall/shorewall.conf:<br>
</b>
<b>/etc/shorewall/shorewall.conf:<br>
</b>
<pre> MACLIST_DISPOSITION=REJECT<br> MACLIST_LOG_LEVEL=info<br></pre>
<b>/etc/shorewall/interfaces:</b><br>
<b>/etc/shorewall/interfaces:</b><br>
<pre> #ZONE INTERFACE BROADCAST OPTIONS<br> net eth0 206.124.146.255 norfc1918,filterping,dhcp,blacklist<br> loc eth2 192.168.1.255 dhcp,filterping,maclist<br> dmz eth1 192.168.2.255 filterping<br> net eth3 206.124.146.255 filterping,blacklist<br> - texas 192.168.9.255 filterping<br> loc ppp+ - filterping<br></pre>
<b>/etc/shorewall/maclist:</b><br>
<pre> #INTERFACE MAC IP ADDRESSES (Optional)<br> eth2 00:A0:CC:63:66:89 192.168.1.3 #Wookie<br> eth2 00:10:B5:EC:FD:0B 192.168.1.4 #Tarry<br> eth2 00:A0:CC:DB:31:C4 192.168.1.5 #Ursa<br> eth2 00:06:25:aa:a8:0f 192.168.1.7 #Eastept1 (Wireless)<br> eth2 00:04:5A:0E:85:B9 192.168.1.250 #Wap<br></pre>
As shown above, I use MAC Verification on <a href="myfiles.htm">my local
zone</a>.<br>
<b>/etc/shorewall/maclist:</b><br>
<pre> #INTERFACE MAC IP ADDRESSES (Optional)<br> eth2 00:A0:CC:63:66:89 192.168.1.3 #Wookie<br> eth2 00:10:B5:EC:FD:0B 192.168.1.4 #Tarry<br> eth2 00:A0:CC:DB:31:C4 192.168.1.5 #Ursa<br> eth2 00:A0:CC:DB:31:C4 192.168.1.128/26 #PPTP Clients to server on Ursa<br> eth2 00:06:25:aa:a8:0f 192.168.1.7 #Eastept1 (Wireless)<br> eth2 00:04:5A:0E:85:B9 192.168.1.250 #Wap<br></pre>
As shown above, I use MAC Verification on <a href="myfiles.htm">my
local zone</a>.<br>
<h3>Example 2: Router in Local Zone</h3>
Suppose now that I add a second ethernet segment to my local zone and
gateway that segment via a router with MAC address 00:06:43:45:C6:15 and
IP address 192.168.1.253. Hosts in the second segment have IP addresses
in the subnet 192.168.2.0/24. I would add the following entry to my /etc/shorewall/maclist
file:<br>
Suppose now that I add a second ethernet segment to my local zone and
gateway that segment via a router with MAC address 00:06:43:45:C6:15 and
IP address 192.168.1.253. Hosts in the second segment have IP addresses
in the subnet 192.168.2.0/24. I would add the following entry to my /etc/shorewall/maclist
file:<br>
<pre> eth2 00:06:43:45:C6:15 192.168.1.253,192.168.2.0/24<br></pre>
This entry accomodates traffic from the router itself (192.168.1.253)
and from the second LAN segment (192.168.2.0/24). Remember that all traffic
being sent to my firewall from the 192.168.2.0/24 segment will be forwarded
by the router so that traffic's MAC address will be that of the router (00:06:43:45:C6:15)
and not that of the host sending the traffic.
<p><font size="2"> Updated 12/29/2002 - <a href="support.htm">Tom Eastep</a>
This entry accomodates traffic from the router itself (192.168.1.253)
and from the second LAN segment (192.168.2.0/24). Remember that all traffic
being sent to my firewall from the 192.168.2.0/24 segment will be forwarded
by the router so that traffic's MAC address will be that of the router
(00:06:43:45:C6:15) and not that of the host sending the traffic.
<p><font size="2"> Updated 1/7/2002 - <a href="support.htm">Tom Eastep</a>
</font></p>
<p><font face="Trebuchet MS"><a href="copyright.htm"><font size="2">Copyright</font>
&copy; <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font></p>
<br>
<br>
<p><a href="copyright.htm"><font size="2">Copyright</font> &copy;
<font size="2">2001, 2002, 2003 Thomas M. Eastep.</font></a><br>
</p>
</body>
</html>

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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<title>Shorewall NAT</title>
<meta name="GENERATOR" content="Microsoft FrontPage 5.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<meta http-equiv="Content-Type"
content="text/html; charset=windows-1252">
<title>Shorewall NAT</title>
<meta name="GENERATOR" content="Microsoft FrontPage 5.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
</head>
<body>
<blockquote>
<table border="0" cellpadding="0" cellspacing="0" style="border-collapse: collapse" width="100%" id="AutoNumber1" bgcolor="#400169" height="90">
<body>
<blockquote>
<table border="0" cellpadding="0" cellspacing="0"
style="border-collapse: collapse;" width="100%" id="AutoNumber1"
bgcolor="#400169" height="90">
<tbody>
<tr>
<td width="100%">
<h1 align="center"><font color="#FFFFFF">Static NAT</font></h1>
</td>
</tr>
</table>
<p><font color="#FF0000"><b>IMPORTANT: If all you want to do is forward
ports to servers behind your firewall, you do NOT want to use static NAT.
Port forwarding can be accomplished with simple entries in the
<a href="Documentation.htm#Rules">rules file</a>.</b></font></p>
<p>Static NAT is a way to make systems behind a
firewall and configured with private IP addresses (those
reserved for private use in RFC1918) appear to have public IP
addresses.</p>
<p>The following figure represents a static NAT
environment.</p>
<p align="center"><strong>
<img src="images/staticnat.png" width="435" height="397"></strong></p>
<blockquote>
</blockquote>
<p align="left">Static NAT can be used to make the systems with the
10.1.1.* addresses appear to be on the upper (130.252.100.*) subnet. If we
assume that the interface to the upper subnet is eth0, then the following
/etc/shorewall/NAT file would make the lower left-hand system appear to have
IP address 130.252.100.18 and the right-hand one to have IP address
<td width="100%">
<h1 align="center"><font color="#ffffff">Static NAT</font></h1>
</td>
</tr>
</tbody>
</table>
<p><font color="#ff0000"><b>IMPORTANT: If all you want to do is forward
ports to servers behind your firewall, you do NOT want to use static
NAT. Port forwarding can be accomplished with simple entries in the
<a href="Documentation.htm#Rules">rules file</a>.</b></font></p>
<p>Static NAT is a way to make systems behind a firewall and configured
with private IP addresses (those reserved for private use in RFC1918)
appear to have public IP addresses. Before you try to use this technique,
I strongly recommend that you read the <a
href="shorewall_setup_guide.htm">Shorewall Setup Guide.</a></p>
<p>The following figure represents a static NAT environment.</p>
<p align="center"><strong> <img src="images/staticnat.png"
width="435" height="397">
</strong></p>
<blockquote> </blockquote>
<p align="left">Static NAT can be used to make the systems with the
10.1.1.* addresses appear to be on the upper (130.252.100.*) subnet. If
we assume that the interface to the upper subnet is eth0, then the following
/etc/shorewall/NAT file would make the lower left-hand system appear
to have IP address 130.252.100.18 and the right-hand one to have IP address
130.252.100.19.</p>
<table border="2" cellpadding="2" style="border-collapse: collapse">
<table border="2" cellpadding="2" style="border-collapse: collapse;">
<tbody>
<tr>
<td><b>EXTERNAL</b></td>
<td><b>INTERFACE</b></td>
<td><b>INTERNAL</b></td>
<td><b>ALL INTERFACES</b></td>
<td><b>LOCAL</b></td>
</tr>
<tr>
<td>130.252.100.18</td>
<td>eth0</td>
<td>10.1.1.2</td>
<td>yes</td>
<td>yes</td>
</tr>
<tr>
<td>130.252.100.19</td>
<td>eth0</td>
<td>10.1.1.3</td>
<td>yes</td>
<td>yes</td>
</tr>
</table>
<p>Be sure that the internal system(s) (10.1.1.2 and 10.1.1.3 in the above
example) is (are) not included in any specification in /etc/shorewall/masq
<td><b>EXTERNAL</b></td>
<td><b>INTERFACE</b></td>
<td><b>INTERNAL</b></td>
<td><b>ALL INTERFACES</b></td>
<td><b>LOCAL</b></td>
</tr>
<tr>
<td>130.252.100.18</td>
<td>eth0</td>
<td>10.1.1.2</td>
<td>yes</td>
<td>yes</td>
</tr>
<tr>
<td>130.252.100.19</td>
<td>eth0</td>
<td>10.1.1.3</td>
<td>yes</td>
<td>yes</td>
</tr>
</tbody>
</table>
<p>Be sure that the internal system(s) (10.1.1.2 and 10.1.1.3 in the above
example) is (are) not included in any specification in /etc/shorewall/masq
or /etc/shorewall/proxyarp.</p>
<p><a name="AllInterFaces"></a>Note 1: The &quot;ALL INTERFACES&quot; column
is used to specify whether access to the external IP from all firewall
interfaces should undergo NAT (Yes or yes) or if only access from the
interface in the INTERFACE column should undergo NAT. If you leave this
column empty, &quot;Yes&quot; is assumed.&nbsp;The ALL INTERFACES column was
added in version 1.1.6.</p>
<p>Note 2: Shorewall will automatically add the external address to the
specified interface unless you specify <a href="Documentation.htm#Aliases">ADD_IP_ALIASES</a>=&quot;no&quot;
(or &quot;No&quot;) in /etc/shorewall/shorewall.conf; If you do not set
ADD_IP_ALIASES or if you set it to &quot;Yes&quot; or &quot;yes&quot; then you must NOT configure your own alias(es).</p>
<p><a name="LocalPackets"></a>Note 3: The contents of the &quot;LOCAL&quot;
column determine whether packets originating on the firewall itself and
destined for the EXTERNAL address are redirected to the internal ADDRESS. If
this column contains &quot;yes&quot; or &quot;Yes&quot; (and the ALL
INTERFACES COLUMN also contains &quot;Yes&quot; or &quot;yes&quot;) then
such packets are redirected; otherwise, such packets are not redirected. The
LOCAL column was added in version 1.1.8.</p>
</blockquote>
<blockquote>
</blockquote>
<p><font size="2">Last updated 3/27/2002 - </font><font size="2">
<a href="support.htm">Tom
Eastep</a></font> </p>
<font face="Trebuchet MS"><a href="copyright.htm"><font size="2">Copyright</font>
© <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font></body></html>
<p><a name="AllInterFaces"></a>Note 1: The "ALL INTERFACES" column
is used to specify whether access to the external IP from all firewall
interfaces should undergo NAT (Yes or yes) or if only access from the
interface in the INTERFACE column should undergo NAT. If you leave this
column empty, "Yes" is assumed. The ALL INTERFACES column was added
in version 1.1.6.</p>
<p>Note 2: Shorewall will automatically add the external address to the
specified interface unless you specify <a
href="Documentation.htm#Aliases">ADD_IP_ALIASES</a>="no" (or "No") in
/etc/shorewall/shorewall.conf; If you do not set ADD_IP_ALIASES or if
you set it to "Yes" or "yes" then you must NOT configure your own alias(es).</p>
<p><a name="LocalPackets"></a>Note 3: The contents of the "LOCAL" column
determine whether packets originating on the firewall itself and destined
for the EXTERNAL address are redirected to the internal ADDRESS. If this
column contains "yes" or "Yes" (and the ALL INTERFACES COLUMN also contains
"Yes" or "yes") then such packets are redirected; otherwise, such packets
are not redirected. The LOCAL column was added in version 1.1.8.</p>
</blockquote>
<blockquote> </blockquote>
<p><font size="2">Last updated 1/11/2003 - </font><font size="2"> <a
href="support.htm">Tom Eastep</a></font> </p>
<a href="copyright.htm"><font size="2">Copyright</font> © <font
size="2">2001, 2002, 2003 Thomas M. Eastep.</font></a><br>
</body>
</html>

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@ -891,8 +891,8 @@ yet and reject the initial TCP connection request if I enable ECN :-( </p>
<p><font size="2">Last modified 10/23/2002 - <a href="support.htm">Tom Eastep</a></font></p>
<p><font face="Trebuchet MS"><a href="copyright.htm"> <font size="2">Copyright</font>
© <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font></p>
<p><a href="copyright.htm"> <font size="2">Copyright</font>
© <font size="2">2001, 2002 Thomas M. Eastep.</font></a></p>
<br>
<br>
</body>

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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<title>Shorewall Proxy ARP</title>
<meta name="GENERATOR" content="Microsoft FrontPage 5.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<meta name="Microsoft Theme" content="none">
<meta http-equiv="Content-Type"
content="text/html; charset=windows-1252">
<title>Shorewall Proxy ARP</title>
<meta name="GENERATOR" content="Microsoft FrontPage 5.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<meta name="Microsoft Theme" content="none">
</head>
<body>
<table border="0" cellpadding="0" cellspacing="0" style="border-collapse: collapse" width="100%" id="AutoNumber1" bgcolor="#400169" height="90">
<body>
<table border="0" cellpadding="0" cellspacing="0"
style="border-collapse: collapse;" width="100%" id="AutoNumber1"
bgcolor="#400169" height="90">
<tbody>
<tr>
<td width="100%">
<h1 align="center"><font color="#ffffff">Proxy ARP</font></h1>
</td>
</tr>
</tbody>
</table>
<p>Proxy ARP allows you to insert a firewall in front of a set of servers
without changing their IP addresses and without having to re-subnet.
Before you try to use this technique, I strongly recommend that you read
the <a href="shorewall_setup_guide.htm">Shorewall Setup Guide.</a></p>
<p>The following figure represents a Proxy ARP environment.</p>
<blockquote>
<p align="center"><strong> <img src="images/proxyarp.png"
width="519" height="397">
</strong></p>
<blockquote> </blockquote>
</blockquote>
<p align="left">Proxy ARP can be used to make the systems with addresses
130.252.100.18 and 130.252.100.19 appear to be on the upper (130.252.100.*)
subnet.  Assuming that the upper firewall interface is eth0 and the
lower interface is eth1, this is accomplished using the following entries
in /etc/shorewall/proxyarp:</p>
<blockquote>
<table border="2" cellpadding="2" style="border-collapse: collapse;">
<tbody>
<tr>
<td width="100%">
<h1 align="center"><font color="#FFFFFF">Proxy ARP</font></h1>
</td>
</tr>
</table>
<p>Proxy ARP allows you to insert a firewall in front of a set of servers
without changing their IP addresses and without having to re-subnet.</p>
<p>The following figure represents a Proxy ARP
environment.</p>
<blockquote>
<p align="center"><strong>
<img src="images/proxyarp.png" width="519" height="397"></strong></p>
<blockquote>
</blockquote>
</blockquote>
<p align="left">Proxy ARP can be used to make the systems with addresses
130.252.100.18 and 130.252.100.19 appear to be on the upper (130.252.100.*)
subnet.&nbsp; Assuming that the upper firewall interface is eth0 and the
lower interface is eth1, this is accomplished using the following entries in
/etc/shorewall/proxyarp:</p>
<blockquote>
<table border="2" cellpadding="2" style="border-collapse: collapse">
<tr>
<td><b>ADDRESS</b></td>
<td><b>INTERFACE</b></td>
<td><b>EXTERNAL</b></td>
<td><b>HAVEROUTE</b></td>
</tr>
<tr>
<td>130.252.100.18</td>
<td>eth1</td>
<td>eth0</td>
<td>no</td>
</tr>
<tr>
<td>130.252.100.19</td>
<td>eth1</td>
<td>eth0</td>
<td>no</td>
</tr>
</table>
</blockquote>
<p>Be sure that the internal systems (130.242.100.18 and 130.252.100.19&nbsp;
in the above example) are not included in any specification in
/etc/shorewall/masq or /etc/shorewall/nat.</p>
<p>Note that I've used an RFC1918 IP address for eth1 - that IP address is
irrelevant. </p>
<p>The lower systems (130.252.100.18 and 130.252.100.19) should have their
subnet mask and default gateway configured exactly the same way that the
Firewall system's eth0 is configured.</p>
<div align="left">
<p align="left">A word of warning is in order here. ISPs typically configure
their routers with a long ARP cache timeout. If you move a system from
parallel to your firewall to behind your firewall with Proxy ARP, it will
probably be HOURS before that system can communicate with the internet. You
can call your ISP and ask them to purge the stale ARP cache entry but many
either can't or won't purge individual entries. You can determine if your
ISP's gateway ARP cache is stale using ping and tcpdump. Suppose that we
suspect that the gateway router has a stale ARP cache entry for 130.252.100.19.
On the firewall, run tcpdump as follows:</div>
<div align="left">
<pre> tcpdump -nei eth0 icmp</pre>
<td><b>ADDRESS</b></td>
<td><b>INTERFACE</b></td>
<td><b>EXTERNAL</b></td>
<td><b>HAVEROUTE</b></td>
</tr>
<tr>
<td>130.252.100.18</td>
<td>eth1</td>
<td>eth0</td>
<td>no</td>
</tr>
<tr>
<td>130.252.100.19</td>
<td>eth1</td>
<td>eth0</td>
<td>no</td>
</tr>
</tbody>
</table>
</blockquote>
<p>Be sure that the internal systems (130.242.100.18 and 130.252.100.19 
in the above example) are not included in any specification in
/etc/shorewall/masq or /etc/shorewall/nat.</p>
<p>Note that I've used an RFC1918 IP address for eth1 - that IP address is
irrelevant. </p>
<p>The lower systems (130.252.100.18 and 130.252.100.19) should have their
subnet mask and default gateway configured exactly the same way that
the Firewall system's eth0 is configured.</p>
<div align="left">
<p align="left">A word of warning is in order here. ISPs typically configure
their routers with a long ARP cache timeout. If you move a system from
parallel to your firewall to behind your firewall with Proxy ARP, it will
probably be HOURS before that system can communicate with the internet.
There are a couple of things that you can try:<br>
</p>
<ol>
<li>(Courtesy of Bradey Honsinger) A reading of Stevens' <i>TCP/IP Illustrated,
Vol 1</i> reveals that a <br>
<br>
"gratuitous" ARP packet should cause the ISP's router to refresh their ARP
cache (section 4.7). A gratuitous ARP is simply a host requesting the MAC
address for its own IP; in addition to ensuring that the IP address isn't
a duplicate...<br>
<br>
"if the host sending the gratuitous ARP has just changed its hardware address...,
this packet causes any other host...that has an entry in its cache for the
old hardware address to update its ARP cache entry accordingly."<br>
<br>
Which is, of course, exactly what you want to do when you switch a host from
being exposed to the Internet to behind Shorewall using proxy ARP (or static
NAT for that matter). Happily enough, recent versions of Redhat's iputils
package include "arping", whose "-U" flag does just that:<br>
<br>
    <font color="#009900"><b>arping -U -I <i>&lt;net if&gt; &lt;newly proxied
IP&gt;</i></b></font><br>
    <font color="#009900"><b>arping -U -I eth0 66.58.99.83 # for example</b></font><br>
<br>
Stevens goes on to mention that not all systems respond correctly to gratuitous
ARPs, but googling for "arping -U" seems to support the idea that it works
most of the time.<br>
<br>
</li>
<li>You can call your ISP and ask them to purge the stale ARP cache
entry but many either can't or won't purge individual entries.</li>
</ol>
You can determine if your ISP's gateway ARP cache is stale using ping
and tcpdump. Suppose that we suspect that the gateway router has a stale
ARP cache entry for 130.252.100.19. On the firewall, run tcpdump as follows:</div>
<div align="left">
<pre> <font color="#009900"><b>tcpdump -nei eth0 icmp</b></font></pre>
</div>
<div align="left">
<p align="left">Now from 130.252.100.19, ping the ISP's gateway (which we
will assume is 130.252.100.254):</p>
</div>
<div align="left">
<p align="left">Now from 130.252.100.19, ping the ISP's gateway (which we will
assume is 130.252.100.254):</div>
<div align="left">
<pre> ping 130.252.100.254</pre>
<div align="left">
<pre> <b><font color="#009900">ping 130.252.100.254</font></b></pre>
</div>
<div align="left">
<p align="left">We can now observe the tcpdump output:</p>
</div>
<div align="left">
<p align="left">We can now observe the tcpdump output:</div>
<div align="left">
<pre> 13:35:12.159321 <u>0:4:e2:20:20:33</u> 0:0:77:95:dd:19 ip 98: 130.252.100.19 &gt; 130.252.100.254: icmp: echo request (DF)
13:35:12.207615 0:0:77:95:dd:19 <u>0:c0:a8:50:b2:57</u> ip 98: 130.252.100.254 &gt; 130.252.100.177 : icmp: echo reply</pre>
<div align="left">
<pre> 13:35:12.159321 <u>0:4:e2:20:20:33</u> 0:0:77:95:dd:19 ip 98: 130.252.100.19 &gt; 130.252.100.254: icmp: echo request (DF)<br> 13:35:12.207615 0:0:77:95:dd:19 <u>0:c0:a8:50:b2:57</u> ip 98: 130.252.100.254 &gt; 130.252.100.177 : icmp: echo reply</pre>
</div>
<div align="left">
<p align="left">Notice that the source MAC address in the echo request is
different from the destination MAC address in the echo reply!! In this
case 0:4:e2:20:20:33 was the MAC of the firewall's eth0 NIC while 0:c0:a8:50:b2:57
was the MAC address of the system on the lower left. In other words, the
gateway's ARP cache still associates 130.252.100.19 with the NIC in that
system rather than with the firewall's eth0.</p>
</div>
<div align="left">
<p align="left">Notice that the source MAC address in the echo request is
different from the destination MAC address in the echo reply!! In this case
0:4:e2:20:20:33 was the MAC of the firewall's eth0 NIC while 0:c0:a8:50:b2:57
was the MAC address of the system on the lower left. In other words, the gateway's ARP cache still
associates 130.252.100.19 with the NIC in that system rather than with the firewall's
eth0.</div>
<p><font size="2">Last updated 8/17/2002 - </font><font size="2">
<a href="support.htm">Tom
Eastep</a></font> </p>
<font face="Trebuchet MS"><a href="copyright.htm"><font size="2">Copyright</font>
© <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font></body></html>
<p><font size="2">Last updated 1/11/2003 - </font><font size="2"> <a
href="support.htm">Tom Eastep</a></font> </p>
<a href="copyright.htm"><font size="2">Copyright</font> © <font
size="2">2001, 2002, 2003 Thomas M. Eastep.</font></a><br>
</body>
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12
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@ -29,9 +29,9 @@
I can hardly justify paying $200US+ a year to a Certificate Authority such
as Thawte (A Division of VeriSign) for an X.509 certificate to prove that
I am who I am. I have therefore established my own Certificate Authority (CA)
and sign my own X.509 certificates. I use these certificates on my web server
(<a href="http://www.shorewall.net">http://www.shorewall.net</a>) as well
as on my mail server (mail.shorewall.net).<br>
and sign my own X.509 certificates. I use these certificates on my mail server
(<a href="https://mail.shorewall.net">https://mail.shorewall.net</a>)
which hosts parts of this web site.<br>
<br>
X.509 certificates are the basis for the Secure Socket Layer (SSL). As part
of establishing an SSL session (URL https://...), your browser verifies the
@ -57,7 +57,7 @@ to accept the sleezy X.509 certificate being presented by my server. <br>
There are two things that you can do:<br>
<ol>
<li>You can accept the www.shorewall.net certificate when your browser
<li>You can accept the mail.shorewall.net certificate when your browser
asks -- your acceptence of the certificate can be temporary (for that access
only) or perminent.</li>
<li>You can download and install <a href="ca.crt">my (self-signed) CA
@ -75,14 +75,14 @@ intented to go to your bank's server to one of my systems that will present
your browser with a bogus certificate claiming that my server is that of
your bank.</li>
<li>If you only accept my server's certificate when prompted then the
most that you have to loose is that when you connect to https://www.shorewall.net,
most that you have to loose is that when you connect to https://mail.shorewall.net,
the server you are connecting to might not be mine.</li>
</ol>
I have my CA certificate loaded into all of my browsers but I certainly
won't be offended if you decline to load it into yours... :-)<br>
<p align="left"><font size="2">Last Updated 11/14/2002 - Tom Eastep</font></p>
<p align="left"><font size="2">Last Updated 12/29/2002 - Tom Eastep</font></p>
<p align="left"><font face="Trebuchet MS"><a href="copyright.htm"> <font
size="2">Copyright</font> &copy; <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font></p>

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<h1 align="center"><font color="#FFFFFF">Copyright</font></h1>
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<h1 align="center"><font color="#ffffff">Copyright</font></h1>
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</table>
<p align="left">Copyright <font face="Trebuchet MS">©</font>&nbsp; 2000, 2001
Thomas M Eastep<br>
&nbsp;</p>
<blockquote>
<p align="left">Permission is granted to copy, distribute and/or modify this
document under the terms of the GNU Free Documentation License, Version 1.1 or
any later version published by the Free Software Foundation; with no Invariant
Sections, with no Front-Cover, and with no Back-Cover Texts. A copy of the
license is included in the section entitled &quot;<a href="GnuCopyright.htm">GNU Free Documentation License</a>&quot;.<br>
&nbsp;</p>
</blockquote>
<p align="left">Copyright <font face="Trebuchet MS">©</font>  2000, 2001,
2003 Thomas M Eastep<br>
 </p>
<blockquote>
<p align="left">Permission is granted to copy, distribute and/or modify
this document under the terms of the GNU Free Documentation License, Version
1.1 or any later version published by the Free Software Foundation; with
no Invariant Sections, with no Front-Cover, and with no Back-Cover Texts.
A copy of the license is included in the section entitled "<a
href="GnuCopyright.htm">GNU Free Documentation License</a>".<br>
 </p>
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Language" content="en-us">
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content="text/html; charset=windows-1252">
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<meta name="ProgId" content="FrontPage.Editor.Document">
<title>Download</title>
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style="border-collapse: collapse;" bordercolor="#111111" width="100%"
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<tbody>
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<td width="100%">
<tbody>
<tr>
<td width="100%">
<h1 align="center"><font color="#ffffff">Shorewall Download</font></h1>
</td>
</tr>
</tbody>
</td>
</tr>
</tbody>
</table>
<p><b>I strongly urge you to read and print a copy of the <a
href="shorewall_quickstart_guide.htm">Shorewall QuickStart Guide</a>
for the configuration that most closely matches your own.<br>
</b></p>
<p>The entire set of Shorewall documentation is available in PDF format at:</p>
href="shorewall_quickstart_guide.htm">Shorewall QuickStart Guide</a>
for the configuration that most closely matches your own.<br>
</b></p>
<p>The entire set of Shorewall documentation is available in PDF format
at:</p>
<p>    <a href="ftp://slovakia.shorewall.net/mirror/shorewall/pdf/">ftp://slovakia.shorewall.net/mirror/shorewall/pdf/</a><br>
    <a href="http://slovakia.shorewall.net/pub/shorewall/pdf/">http://slovakia.shorewall.net/pub/shorewall/pdf/</a><br>
    <a href="rsync://slovakia.shorewall.net/shorewall/pdf/">rsync://slovakia.shorewall.net/shorewall/pdf/</a>
    <a href="http://slovakia.shorewall.net/pub/shorewall/pdf/">http://slovakia.shorewall.net/pub/shorewall/pdf/</a><br>
    <a href="rsync://slovakia.shorewall.net/shorewall/pdf/">rsync://slovakia.shorewall.net/shorewall/pdf/</a>
</p>
<p>The documentation in HTML format is included in the .rpm and in the .tgz
packages below.</p>
<p>The documentation in HTML format is included in the .rpm and in the
.tgz packages below.</p>
<p> Once you've done that, download <u> one</u> of the modules:</p>
<ul>
<li>If you run a <b>RedHat</b>, <b>SuSE, Mandrake</b>, <b>
Linux PPC</b> or <b> TurboLinux</b> distribution with
a 2.4 kernel, you can use the RPM version (note: the RPM
should also work with other distributions that store init
scripts in /etc/init.d and that include chkconfig or insserv).
If you find that it works in other cases, let <a
href="mailto:teastep@shorewall.net"> me</a> know so that
I can mention them here. See the <a href="Install.htm">Installation Instructions</a>
if you have problems installing the RPM.</li>
<li>If you are running LRP, download the .lrp file (you might
also want to download the .tgz so you will have a copy of the documentation).</li>
<li>If you run <a href="http://www.debian.org"><b>Debian</b></a>
and would like a .deb package, Shorewall is included in both the
<a href="http://packages.debian.org/testing/net/shorewall.html">Debian
Testing Branch</a> and the <a
href="http://packages.debian.org/unstable/net/shorewall.html">Debian
Unstable Branch</a>.</li>
<li>Otherwise, download the <i>shorewall</i>
module (.tgz)</li>
<li>If you run a <b>RedHat</b>, <b>SuSE, Mandrake</b>, <b>
Linux PPC</b> or <b> TurboLinux</b> distribution with
a 2.4 kernel, you can use the RPM version (note: the
RPM should also work with other distributions that store
init scripts in /etc/init.d and that include chkconfig or
insserv). If you find that it works in other cases, let <a
href="mailto:teastep@shorewall.net"> me</a> know so that
I can mention them here. See the <a href="Install.htm">Installation
Instructions</a> if you have problems installing the RPM.</li>
<li>If you are running LRP, download the .lrp file (you
might also want to download the .tgz so you will have a copy of
the documentation).</li>
<li>If you run <a href="http://www.debian.org"><b>Debian</b></a>
and would like a .deb package, Shorewall is included in both the
<a href="http://packages.debian.org/testing/net/shorewall.html">Debian
Testing Branch</a> and the <a
href="http://packages.debian.org/unstable/net/shorewall.html">Debian
Unstable Branch</a>.</li>
<li>Otherwise, download the <i>shorewall</i>
module (.tgz)</li>
</ul>
<p>The documentation in HTML format is included in the .tgz and .rpm files
and there is an documentation .deb that also contains the documentation.</p>
<p>Please verify the version that you have downloaded -- during the
release of a new version of Shorewall, the links below may point
to a newer or an older version than is shown below.</p>
<p>The documentation in HTML format is included in the .tgz and .rpm files
and there is an documentation .deb that also contains the documentation.</p>
<p>Please verify the version that you have downloaded -- during the
release of a new version of Shorewall, the links below may
point to a newer or an older version than is shown below.</p>
<ul>
<li>RPM - "rpm -qip LATEST.rpm"</li>
<li>TARBALL - "tar -ztf LATEST.tgz" (the directory name
<li>RPM - "rpm -qip LATEST.rpm"</li>
<li>TARBALL - "tar -ztf LATEST.tgz" (the directory name
will contain the version)</li>
<li>LRP - "mkdir Shorewall.lrp; cd Shorewall.lrp; tar
-zxf &lt;downloaded .lrp&gt;; cat var/lib/lrpkg/shorwall.version" </li>
<li>LRP - "mkdir Shorewall.lrp; cd Shorewall.lrp; tar
-zxf &lt;downloaded .lrp&gt;; cat var/lib/lrpkg/shorwall.version"
</li>
</ul>
<p><font face="Arial">Once you have verified the version, check the
</font><font color="#ff0000" face="Arial"> <a href="errata.htm"> errata</a></font><font
face="Arial"> to see if there are updates that apply to the version
that you have downloaded.</font></p>
<p><font color="#ff0000" face="Arial"><b>WARNING - YOU CAN <u>NOT</u> SIMPLY
INSTALL THE RPM AND ISSUE A "shorewall start" COMMAND. SOME CONFIGURATION
IS REQUIRED BEFORE THE FIREWALL WILL START. Once you have completed
configuration of your firewall, you can enable startup by removing the
file /etc/shorewall/startup_disabled.</b></font></p>
<p><b>Download Latest Version</b> (<b>1.3.12</b>): <b>Remember that updates
to the mirrors occur 1-12 hours after an update to the Washington
State site.</b></p>
<blockquote>
<p>Once you have verified the version, check the <font
color="#ff0000"> <a href="errata.htm"> errata</a></font> to see
if there are updates that apply to the version that you have
downloaded.</p>
<p><font color="#ff0000"><b>WARNING - YOU CAN <u>NOT</u> SIMPLY INSTALL
THE RPM AND ISSUE A "shorewall start" COMMAND. SOME CONFIGURATION
IS REQUIRED BEFORE THE FIREWALL WILL START. Once you have completed configuration
of your firewall, you can enable startup by removing the file /etc/shorewall/startup_disabled.</b></font></p>
<p><b>Download Latest Version</b> (<b>1.3.13</b>): <b>Remember that updates
to the mirrors occur 1-12 hours after an update to the Washington State
site.</b></p>
<blockquote>
<table border="2" cellspacing="3" cellpadding="3"
style="border-collapse: collapse;">
<tbody>
<tbody>
<tr>
<td><b>SERVER LOCATION</b></td>
<td><b>DOMAIN</b></td>
<td><b>HTTP</b></td>
<td><b>FTP</b></td>
</tr>
<tr>
<td><b>SERVER LOCATION</b></td>
<td><b>DOMAIN</b></td>
<td><b>HTTP</b></td>
<td><b>FTP</b></td>
</tr>
<tr>
<td valign="top">SourceForge<br>
</td>
<td valign="top">sf.net<br>
</td>
<td valign="top"><a
<td valign="top">SourceForge<br>
</td>
<td valign="top">sf.net<br>
</td>
<td valign="top"><a
href="http://sourceforge.net/project/showfiles.php?group_id=22587">Download</a><br>
</td>
<td valign="top"><br>
</td>
</tr>
<tr>
<td>Slovak Republic</td>
<td>Shorewall.net</td>
<td><a
href="http://slovakia.shorewall.net/pub/shorewall/LATEST.rpm">Download .rpm</a><br>
<a
href="http://slovakia.shorewall.net/pub/shorewall/LATEST.tgz">Download
.tgz</a> <br>
<a
href="http://slovakia.shorewall.net/pub/shorewall/LATEST.lrp">Download
.lrp</a><br>
<a
href="http://slovakia.shorewall.net/pub/shorewall/LATEST.md5sums">
Download.md5sums</a></td>
<td> <a target="_blank"
href="ftp://slovakia.shorewall.net/mirror/shorewall/LATEST.rpm">Download
.rpm</a>  <br>
<a target="_blank"
href="ftp://slovakia.shorewall.net/mirror/shorewall/LATEST.tgz">Download
.tgz</a> <br>
<a target="_blank"
href="ftp://slovakia.shorewall.net/mirror/shorewall/LATEST.lrp">Download
.rpm</a><br>
<a
href="ftp://slovakia.shorewall.net/mirror/shorewall/LATEST.md5sums">
Download.md5sums</a></td>
</tr>
<tr>
<td>Texas, USA</td>
<td>Infohiiway.com</td>
<td><a
href="http://shorewall.infohiiway.com/pub/shorewall/LATEST.rpm">Download
.rpm</a><br>
<a
href="http://shorewall.infohiiway.com/pub/shorewall/LATEST.tgz">Download
.tgz</a> <br>
<a
href="http://shorewall.infohiiway.com/pub/shorewall/LATEST.lrp">Download
.lrp</a><br>
<a
href="http://shorewall.infohiiway.com/pub/shorewall/LATEST.md5sums">
Download.md5sums</a></td>
<td> <a target="_blank"
href="ftp://ftp.infohiiway.com/pub/shorewall/LATEST.rpm">Download .rpm</a>  <br>
<a target="_blank"
href="ftp://ftp.infohiiway.com/pub/shorewall/LATEST.tgz">Download
.tgz</a> <br>
<a target="_blank"
href="ftp://ftp.infohiiway.com/pub/shorewall/LATEST.lrp"> Download
.lrp</a><br>
<a
href="ftp://ftp.infohiiway.com/pub/shorewall/LATEST.md5sums">
Download.md5sums</a></td>
</tr>
<tr>
<td>Hamburg, Germany</td>
<td>Shorewall.net</td>
<td><a
href="http://germany.shorewall.net/pub/shorewall/LATEST.rpm"> Download
.rpm</a><br>
<a
href="http://germany.shorewall.net/pub/shorewall/LATEST.tgz">Download
.tgz</a><br>
<a
href="http://germany.shorewall.net/pub/shorewall/LATEST.lrp">Download
.lrp</a><br>
<a
href="http://germany.shorewall.net/pub/shorewall/LATEST.md5sums">
Download.md5sums</a></td>
<td> <a target="_blank"
href="ftp://germany.shorewall.net/pub/shorewall/LATEST.rpm"> Download
.rpm</a>  <br>
<a target="_blank"
href="ftp://germany.shorewall.net/pub/shorewall/LATEST.tgz">Download
.tgz</a> <br>
<a target="_blank"
href="ftp://germany.shorewall.net/pub/shorewall/LATEST.lrp">Download
.lrp</a><br>
<a target="_blank"
href="ftp://germany.shorewall.net/pub/shorewall/LATEST.md5sums">Download
.md5sums</a></td>
</tr>
<tr>
<td>Martinez (Zona Norte - GBA), Argentina</td>
<td>Correofuego.com.ar</td>
<td> <a target="_blank"
href="http://shorewall.correofuego.com.ar/pub/mirrors/shorewall/LATEST.rpm">Download
.rpm</a>  <br>
<a target="_blank"
href="http://shorewall.correofuego.com.ar/pub/mirrors/shorewall/LATEST.tgz">Download
.tgz</a> <br>
<a target="_blank"
href="http://shorewall.correofuego.com.ar/pub/mirrors/shorewall/LATEST.lrp">
Download .lrp</a><br>
<a target="_blank"
href="http://shorewall.correofuego.com.ar/pub/mirrors/shorewall/LATEST.md5sums">Download
.md5sums</a></td>
<td> <a target="_blank"
href="ftp://shorewall.correofuego.com.ar/pub/mirrors/shorewall/LATEST.rpm">Download
.rpm</a>  <br>
<a target="_blank"
href="ftp://shorewall.correofuego.com.ar/pub/mirrors/shorewall/LATEST.tgz">Download
.tgz</a> <br>
<a target="_blank"
href="ftp://shorewall.correofuego.com.ar/pub/mirrors/shorewall/LATEST.lrp">
Download .lrp</a><br>
<a target="_blank"
href="ftp://shorewall.correofuego.com.ar/pub/mirrors/shorewall/LATEST.md5sums">Download
.md5sums</a></td>
</tr>
<tr>
<td>Paris, France</td>
<td>Shorewall.net</td>
<td><a
href="http://france.shorewall.net/pub/LATEST.rpm">Download .rpm</a><br>
<a
href="http://france.shorewall.net/pub/LATEST.tgz">Download .tgz</a> <br>
<a
href="http://france.shorewall.net/pub/LATEST.lrp">Download .lrp</a><br>
<a
href="http://france.shorewall.net/pub/LATEST.md5sums">Download
.md5sums</a></td>
<td> <a target="_blank"
href="ftp://france.shorewall.net/pub/mirrors/shorewall/LATEST.rpm">Download
.rpm</a>  <br>
<a target="_blank"
href="ftp://france.shorewall.net/pub/mirrors/shorewall/LATEST.tgz">Download
.tgz</a> <br>
<a target="_blank"
href="ftp://france.shorewall.net/pub/mirrors/shorewall/LATEST.lrp">Download
.lrp</a><br>
<a target="_blank"
href="ftp://france.shorewall.net/pub/mirrors/shorewall/LATEST.md5sums">Download
.md5sums</a></td>
</tr>
<tr>
<td valign="middle">Washington State, USA<br>
</td>
<td valign="middle">Shorewall.net<br>
</td>
<td valign="top"><a
href="http://www.shorewall.net/pub/shorewall/LATEST.rpm">Download .rpm</a><br>
<a
href="http://www.shorewall.net/pub/shorewall/LATEST.tgz">Download
.tgz</a> <br>
<a
href="http://www.shorewall.net/pub/shorewall/LATEST.lrp">Download
.lrp</a><br>
<a
href="http://www.shorewall.net/pub/shorewall/LATEST.md5sums">Download
.md5sums</a><br>
</td>
<td valign="top"><a
href="ftp://ftp.shorewall.net/pub/shorewall/LATEST.rpm" target="_blank">
Download .rpm</a> <br>
<a
href="ftp://ftp.shorewall.net/pub/shorewall/LATEST.tgz" target="_blank">Download
.tgz</a> <br>
<a
href="ftp://ftp.shorewall.net/pub/shorewall/LATEST.lrp" target="_blank">Download
.lrp</a><br>
<a target="_blank"
href="ftp://ftp.shorewall.net/pub/shorewall/LATEST.md5sums">Download
.md5sums</a><br>
</td>
</td>
<td valign="top"><br>
</td>
</tr>
<tr>
<td>Slovak Republic</td>
<td>Shorewall.net</td>
<td><a
href="http://slovakia.shorewall.net/pub/shorewall/LATEST.rpm">Download .rpm</a><br>
<a
href="http://slovakia.shorewall.net/pub/shorewall/LATEST.tgz">Download
.tgz</a> <br>
<a
href="http://slovakia.shorewall.net/pub/shorewall/LATEST.lrp">Download
.lrp</a><br>
<a
href="http://slovakia.shorewall.net/pub/shorewall/LATEST.md5sums">
Download.md5sums</a></td>
<td> <a target="_blank"
href="ftp://slovakia.shorewall.net/mirror/shorewall/LATEST.rpm">Download
.rpm</a>  <br>
<a target="_blank"
href="ftp://slovakia.shorewall.net/mirror/shorewall/LATEST.tgz">Download
.tgz</a> <br>
<a target="_blank"
href="ftp://slovakia.shorewall.net/mirror/shorewall/LATEST.lrp">Download
.rpm</a><br>
<a
href="ftp://slovakia.shorewall.net/mirror/shorewall/LATEST.md5sums">
Download.md5sums</a></td>
</tr>
<tr>
<td>Texas, USA</td>
<td>Infohiiway.com</td>
<td><a
href="http://shorewall.infohiiway.com/pub/shorewall/LATEST.rpm">Download
.rpm</a><br>
<a
href="http://shorewall.infohiiway.com/pub/shorewall/LATEST.tgz">Download
.tgz</a> <br>
<a
href="http://shorewall.infohiiway.com/pub/shorewall/LATEST.lrp">Download
.lrp</a><br>
<a
href="http://shorewall.infohiiway.com/pub/shorewall/LATEST.md5sums">
Download.md5sums</a></td>
<td> <a target="_blank"
href="ftp://ftp.infohiiway.com/pub/shorewall/LATEST.rpm">Download .rpm</a>  <br>
<a target="_blank"
href="ftp://ftp.infohiiway.com/pub/shorewall/LATEST.tgz">Download
.tgz</a> <br>
<a target="_blank"
href="ftp://ftp.infohiiway.com/pub/shorewall/LATEST.lrp"> Download
.lrp</a><br>
<a
href="ftp://ftp.infohiiway.com/pub/shorewall/LATEST.md5sums">
Download.md5sums</a></td>
</tr>
<tr>
<td>Hamburg, Germany</td>
<td>Shorewall.net</td>
<td><a
href="http://germany.shorewall.net/pub/shorewall/LATEST.rpm"> Download
.rpm</a><br>
<a
href="http://germany.shorewall.net/pub/shorewall/LATEST.tgz">Download
.tgz</a><br>
<a
href="http://germany.shorewall.net/pub/shorewall/LATEST.lrp">Download
.lrp</a><br>
<a
href="http://germany.shorewall.net/pub/shorewall/LATEST.md5sums">
Download.md5sums</a></td>
<td> <a target="_blank"
href="ftp://germany.shorewall.net/pub/shorewall/LATEST.rpm"> Download
.rpm</a>  <br>
<a target="_blank"
href="ftp://germany.shorewall.net/pub/shorewall/LATEST.tgz">Download
.tgz</a> <br>
<a target="_blank"
href="ftp://germany.shorewall.net/pub/shorewall/LATEST.lrp">Download
.lrp</a><br>
<a target="_blank"
href="ftp://germany.shorewall.net/pub/shorewall/LATEST.md5sums">Download
.md5sums</a></td>
</tr>
<tr>
<td>Martinez (Zona Norte - GBA), Argentina</td>
<td>Correofuego.com.ar</td>
<td> <a target="_blank"
href="http://shorewall.correofuego.com.ar/pub/mirrors/shorewall/LATEST.rpm">Download
.rpm</a>  <br>
<a target="_blank"
href="http://shorewall.correofuego.com.ar/pub/mirrors/shorewall/LATEST.tgz">Download
.tgz</a> <br>
<a target="_blank"
href="http://shorewall.correofuego.com.ar/pub/mirrors/shorewall/LATEST.lrp">
Download .lrp</a><br>
<a target="_blank"
href="http://shorewall.correofuego.com.ar/pub/mirrors/shorewall/LATEST.md5sums">Download
.md5sums</a></td>
<td> <a target="_blank"
href="ftp://shorewall.correofuego.com.ar/pub/mirrors/shorewall/LATEST.rpm">Download
.rpm</a>  <br>
<a target="_blank"
href="ftp://shorewall.correofuego.com.ar/pub/mirrors/shorewall/LATEST.tgz">Download
.tgz</a> <br>
<a target="_blank"
href="ftp://shorewall.correofuego.com.ar/pub/mirrors/shorewall/LATEST.lrp">
Download .lrp</a><br>
<a target="_blank"
href="ftp://shorewall.correofuego.com.ar/pub/mirrors/shorewall/LATEST.md5sums">Download
.md5sums</a></td>
</tr>
<tr>
<td>Paris, France</td>
<td>Shorewall.net</td>
<td><a
href="http://france.shorewall.net/pub/LATEST.rpm">Download .rpm</a><br>
<a
href="http://france.shorewall.net/pub/LATEST.tgz">Download
.tgz</a> <br>
<a
href="http://france.shorewall.net/pub/LATEST.lrp">Download
.lrp</a><br>
<a
href="http://france.shorewall.net/pub/LATEST.md5sums">Download
.md5sums</a></td>
<td> <a target="_blank"
href="ftp://france.shorewall.net/pub/mirrors/shorewall/LATEST.rpm">Download
.rpm</a>  <br>
<a target="_blank"
href="ftp://france.shorewall.net/pub/mirrors/shorewall/LATEST.tgz">Download
.tgz</a> <br>
<a target="_blank"
href="ftp://france.shorewall.net/pub/mirrors/shorewall/LATEST.lrp">Download
.lrp</a><br>
<a target="_blank"
href="ftp://france.shorewall.net/pub/mirrors/shorewall/LATEST.md5sums">Download
.md5sums</a></td>
</tr>
<tr>
<td valign="middle">Washington State, USA<br>
</td>
<td valign="middle">Shorewall.net<br>
</td>
<td valign="top"><a
href="http://www.shorewall.net/pub/shorewall/LATEST.rpm">Download .rpm</a><br>
<a
href="http://www.shorewall.net/pub/shorewall/LATEST.tgz">Download
.tgz</a> <br>
<a
href="http://www.shorewall.net/pub/shorewall/LATEST.lrp">Download
.lrp</a><br>
<a
href="http://www.shorewall.net/pub/shorewall/LATEST.md5sums">Download
.md5sums</a><br>
</td>
<td valign="top"><a
href="ftp://ftp.shorewall.net/pub/shorewall/LATEST.rpm" target="_blank">
Download .rpm</a> <br>
<a
href="ftp://ftp.shorewall.net/pub/shorewall/LATEST.tgz" target="_blank">Download
.tgz</a> <br>
<a
href="ftp://ftp.shorewall.net/pub/shorewall/LATEST.lrp" target="_blank">Download
.lrp</a><br>
<a target="_blank"
href="ftp://ftp.shorewall.net/pub/shorewall/LATEST.md5sums">Download
.md5sums</a><br>
</td>
</tr>
</tbody>
</tbody>
</table>
</blockquote>
</blockquote>
<p><b>Browse Download Sites:</b></p>
<blockquote>
<blockquote>
<table border="2" cellpadding="2" style="border-collapse: collapse;">
<tbody>
<tr>
<td><b>SERVER LOCATION</b></td>
<td><b>DOMAIN</b></td>
<td><b>HTTP</b></td>
<td><b>FTP</b></td>
</tr>
<tr>
<td>SourceForge<br>
</td>
<td>sf.net</td>
<td><a
<tbody>
<tr>
<td><b>SERVER LOCATION</b></td>
<td><b>DOMAIN</b></td>
<td><b>HTTP</b></td>
<td><b>FTP</b></td>
</tr>
<tr>
<td>SourceForge<br>
</td>
<td>sf.net</td>
<td><a
href="http://sourceforge.net/project/showfiles.php?group_id=22587">Browse</a></td>
<td>N/A</td>
</tr>
<tr>
<td>Slovak Republic</td>
<td>Shorewall.net</td>
<td><a
href="http://slovakia.shorewall.net/pub/shorewall/">Browse</a></td>
<td> <a target="_blank"
href="ftp://slovakia.shorewall.net/mirror/shorewall/">Browse</a></td>
</tr>
<tr>
<td>Texas, USA</td>
<td>Infohiiway.com</td>
<td><a
href="http://shorewall.infohiiway.com/pub/shorewall">Browse</a></td>
<td><a target="_blank"
href="ftp://ftp.infohiiway.com/pub/shorewall/">Browse</a></td>
</tr>
<tr>
<td>Hamburg, Germany</td>
<td>Shorewall.net</td>
<td><a
href="http://germany.shorewall.net/pub/shorewall/">Browse</a></td>
<td><a target="_blank"
href="ftp://germany.shorewall.net/pub/shorewall">Browse</a></td>
</tr>
<tr>
<td>Martinez (Zona Norte - GBA), Argentina</td>
<td>Correofuego.com.ar</td>
<td><a
href="http://shorewall.correofuego.com.ar/pub/mirrors/shorewall">Browse</a></td>
<td> <a target="_blank"
href="ftp://shorewall.correofuego.com.ar/pub/mirrors/shorewall"> Browse</a></td>
</tr>
<tr>
<td>France</td>
<td>Shorewall.net</td>
<td><a
href="http://france.shorewall.net/pub/shorewall/LATEST.lrp">Browse</a></td>
<td> <a target="_blank"
href="ftp://france.shorewall.net/pub/mirrors/shorewall/">Browse</a></td>
</tr>
<td>N/A</td>
</tr>
<tr>
<td>Washington State, USA</td>
<td>Shorewall.net</td>
<td><a
href="http://www.shorewall.net/pub/shorewall/">Browse</a></td>
<td><a href="ftp://ftp.shorewall.net/pub/shorewall/"
target="_blank">Browse</a></td>
<td>Slovak Republic</td>
<td>Shorewall.net</td>
<td><a
href="http://slovakia.shorewall.net/pub/shorewall/">Browse</a></td>
<td> <a target="_blank"
href="ftp://slovakia.shorewall.net/mirror/shorewall/">Browse</a></td>
</tr>
<tr>
<td>Texas, USA</td>
<td>Infohiiway.com</td>
<td><a
href="http://shorewall.infohiiway.com/pub/shorewall">Browse</a></td>
<td><a target="_blank"
href="ftp://ftp.infohiiway.com/pub/shorewall/">Browse</a></td>
</tr>
<tr>
<td>Hamburg, Germany</td>
<td>Shorewall.net</td>
<td><a
href="http://germany.shorewall.net/pub/shorewall/">Browse</a></td>
<td><a target="_blank"
href="ftp://germany.shorewall.net/pub/shorewall">Browse</a></td>
</tr>
<tr>
<td>Martinez (Zona Norte - GBA), Argentina</td>
<td>Correofuego.com.ar</td>
<td><a
href="http://shorewall.correofuego.com.ar/pub/mirrors/shorewall">Browse</a></td>
<td> <a target="_blank"
href="ftp://shorewall.correofuego.com.ar/pub/mirrors/shorewall"> Browse</a></td>
</tr>
<tr>
<td>France</td>
<td>Shorewall.net</td>
<td><a
href="http://france.shorewall.net/pub/shorewall/LATEST.lrp">Browse</a></td>
<td> <a target="_blank"
href="ftp://france.shorewall.net/pub/mirrors/shorewall/">Browse</a></td>
</tr>
<tr>
<td>Washington State, USA</td>
<td>Shorewall.net</td>
<td><a
href="http://www.shorewall.net/pub/shorewall/">Browse</a></td>
<td><a
href="ftp://ftp.shorewall.net/pub/shorewall/" target="_blank">Browse</a></td>
</tr>
</tbody>
</tbody>
</table>
</blockquote>
</blockquote>
<p align="left"><b>CVS:</b></p>
<blockquote>
<blockquote>
<p align="left">The <a target="_top"
href="http://www.shorewall.net/cgi-bin/cvs/cvsweb.cgi">CVS repository at
cvs.shorewall.net</a> contains the latest snapshots of the each Shorewall
component. There's no guarantee that what you find there will work at
all.<br>
</p>
</blockquote>
<p align="left"><font size="2">Last Updated 12/12/2002 - <a
href="http://www.shorewall.net/cgi-bin/cvs/cvsweb.cgi">CVS repository at
cvs.shorewall.net</a> contains the latest snapshots of the each Shorewall
component. There's no guarantee that what you find there will work
at all.<br>
</p>
</blockquote>
<p align="left"><font size="2">Last Updated 1/13/2003 - <a
href="support.htm">Tom Eastep</a></font></p>
<p><font face="Trebuchet MS"><a href="copyright.htm"><font size="2">Copyright</font>
© <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font><br>
</p>
<p><a href="copyright.htm"><font size="2">Copyright</font> © <font
size="2">2001, 2002, 2003 Thomas M. Eastep.</font></a><br>
</p>
<br>
<br>
</body>
</html>

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@ -207,9 +207,9 @@ ignored<br>
<a href="support.htm">Tom Eastep</a></font>
</p>
<p align="left"><font face="Trebuchet MS"><a href="copyright.htm">
<font size="2">Copyright</font> © <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font></p>
<p align="left"><a href="copyright.htm">
<font size="2">Copyright</font> © <font size="2">2001, 2002 Thomas M. Eastep.</font></a></p>
</body>
</html>
</html>

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@ -70,5 +70,5 @@ type &quot;rpm -e shorewall&quot;.</p>
<p><font size="2">Last updated 3/26/2001 - </font><font size="2">
<a href="support.htm">Tom
Eastep</a></font> </p>
<font face="Trebuchet MS"><a href="copyright.htm"><font size="2">Copyright</font>
© <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font></body></html>
<a href="copyright.htm"><font size="2">Copyright</font>
© <font size="2">2001, 2002 Thomas M. Eastep.</font></a></body></html>

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@ -142,5 +142,5 @@ the options selected above built as modules:</p>
<p><font size="2">Last updated 3/10/2002 - </font><font size="2">
<a href="support.htm">Tom
Eastep</a></font> </p>
<font face="Trebuchet MS"><a href="copyright.htm"><font size="2">Copyright</font>
© <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font></body></html>
<a href="copyright.htm"><font size="2">Copyright</font>
© <font size="2">2001, 2002 Thomas M. Eastep.</font></a></body></html>

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@ -1,127 +1,138 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Language" content="en-us">
<meta http-equiv="Content-Type"
content="text/html; charset=windows-1252">
<meta name="GENERATOR" content="Microsoft FrontPage 5.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<title>Shorewall Mailing Lists</title>
<meta name="Microsoft Theme" content="none">
</head>
<body>
<table height="90" bgcolor="#400169" id="AutoNumber1" width="100%"
style="border-collapse: collapse;" cellspacing="0" cellpadding="0"
border="0">
<tbody>
<tr>
<td width="100%">
<tbody>
<tr>
<td width="33%" valign="middle">
<h1 align="center"><a
href="http://www.centralcommand.com/linux_products.html"><img
src="images/Vexira_Antivirus_Logo.gif" alt="Vexira Logo" width="78"
height="79" align="left">
</a><a
</a></h1>
<h1 align="center"><a
href="http://www.gnu.org/software/mailman/mailman.html"> <img
border="0" src="images/logo-sm.jpg" align="left" hspace="5" width="110"
height="35">
</a><a href="http://www.postfix.org/"> <img
height="35" alt="">
</a></h1>
<p align="right"><br>
<font color="#ffffff"><b>   </b></font> </p>
</td>
<td valign="middle" width="34%" align="center">
<h1 align="center"><font color="#ffffff">Shorewall Mailing Lists</font></h1>
</td>
<td valign="middle" width="33%">
<h1 align="center"><a href="http://www.postfix.org/"> <img
src="images/small-picture.gif" align="right" border="0" width="115"
height="45">
</a><font color="#ffffff">Shorewall Mailing Lists<a
href="http://www.inter7.com/courierimap/"><img
src="images/courier-imap.png" alt="Courier-Imap" width="100"
height="38" align="right">
</a></font></h1>
<p align="right"><font color="#ffffff"><b><br>
</b></font></p>
<p align="right"><font color="#ffffff"><b><br>
Powered by Postfix     </b></font> </p>
</td>
</tr>
</tbody>
height="45" alt="(Postfix Logo)">
</a></h1>
<br>
<div align="right"><br>
<b><font color="#ffffff">Powered by Postfix    </font></b><br>
</div>
</td>
</tr>
</tbody>
</table>
<p align="left"> <b>Note: </b>The list server limits posts to 120kb.</p>
<h2 align="left">Not getting List Mail? -- <a
href="mailing_list_problems.htm">Check Here</a></h2>
<p align="left">If you experience problems with any of these lists, please
let <a href="mailto:teastep@shorewall.net">me</a> know</p>
<h2 align="left">Not able to Post Mail to shorewall.net?</h2>
<p align="left">You can report such problems by sending mail to tom dot eastep
at hp dot com.</p>
<p align="left">If you experience problems with any of these lists, please
let <a href="mailto:teastep@shorewall.net">me</a> know</p>
<h2 align="left">Not able to Post Mail to shorewall.net?</h2>
<p align="left">You can report such problems by sending mail to tom dot eastep
at hp dot com.</p>
<h2>A Word about SPAM Filters <a href="http://ordb.org"></a><a
href="http://osirusoft.com/"> </a></h2>
<p>Before subscribing please read my <a href="spam_filters.htm">policy
about list traffic that bounces.</a> Also please note that the mail server
at shorewall.net checks incoming mail:<br>
</p>
<p>Before subscribing please read my <a href="spam_filters.htm">policy
about list traffic that bounces.</a> Also please note that the mail server
at shorewall.net checks incoming mail:<br>
</p>
<ol>
<li>against <a href="http://spamassassin.org">Spamassassin</a>
(including <a href="http://razor.sourceforge.net/">Vipul's Razor</a>).<br>
</li>
<li>to ensure that the sender address is fully qualified.</li>
<li>to verify that the sender's domain has an A or MX record in
DNS.</li>
<li>to ensure that the host name in the HELO/EHLO command is a
valid fully-qualified DNS name that resolves.</li>
<li>against <a href="http://spamassassin.org">Spamassassin</a>
(including <a href="http://razor.sourceforge.net/">Vipul's Razor</a>).<br>
</li>
<li>to ensure that the sender address is fully qualified.</li>
<li>to verify that the sender's domain has an A or MX record
in DNS.</li>
<li>to ensure that the host name in the HELO/EHLO command is
a valid fully-qualified DNS name that resolves.</li>
</ol>
<h2>Please post in plain text</h2>
A growing number of MTAs serving list subscribers are rejecting all HTML
traffic. At least one MTA has gone so far as to blacklist shorewall.net "for
continuous abuse" because it has been my policy to allow HTML in list posts!!<br>
<br>
I think that blocking all HTML is a Draconian way to control spam and
that the ultimate losers here are not the spammers but the list subscribers
whose MTAs are bouncing all shorewall.net mail. As one list subscriber wrote
to me privately "These e-mail admin's need to get a <i>(explitive deleted)</i>
life instead of trying to rid the planet of HTML based e-mail". Nevertheless,
to allow subscribers to receive list posts as must as possible, I have now
configured the list server at shorewall.net to strip all HTML from outgoing
posts.<br>
<h2>Other Mail Delivery Problems</h2>
If you find that you are missing an occasional list post, your e-mail admin
may be blocking mail whose <i>Received:</i> headers contain the names of
certain ISPs. Again, I believe that such policies hurt more than they help
but I'm not prepared to go so far as to start stripping <i>Received:</i>
headers to circumvent those policies.<br>
A growing number of MTAs serving list subscribers are rejecting all
HTML traffic. At least one MTA has gone so far as to blacklist shorewall.net
"for continuous abuse" because it has been my policy to allow HTML in list
posts!!<br>
<br>
I think that blocking all HTML is a Draconian way to control spam and
that the ultimate losers here are not the spammers but the list subscribers
whose MTAs are bouncing all shorewall.net mail. As one list subscriber wrote
to me privately "These e-mail admin's need to get a <i>(explitive deleted)</i>
life instead of trying to rid the planet of HTML based e-mail". Nevertheless,
to allow subscribers to receive list posts as must as possible, I have now
configured the list server at shorewall.net to strip all HTML from outgoing
posts. This means that HTML-only posts will be bounced by the list server.<br>
<p align="left"> <b>Note: </b>The list server limits posts to 120kb.<br>
</p>
<h2>Other Mail Delivery Problems</h2>
If you find that you are missing an occasional list post, your e-mail
admin may be blocking mail whose <i>Received:</i> headers contain the names
of certain ISPs. Again, I believe that such policies hurt more than they
help but I'm not prepared to go so far as to start stripping <i>Received:</i>
headers to circumvent those policies.<br>
<h2 align="left">Mailing Lists Archive Search</h2>
<form method="post" action="http://mail.shorewall.net/cgi-bin/htsearch">
<p> <font size="-1"> Match:
<form method="post" action="http://mail.shorewall.net/cgi-bin/htsearch">
<p> <font size="-1"> Match:
<select name="method">
<option value="and">All </option>
<option value="or">Any </option>
<option value="boolean">Boolean </option>
</select>
Format:
Format:
<select name="format">
<option value="builtin-long">Long </option>
<option value="builtin-short">Short </option>
</select>
Sort by:
Sort by:
<select name="sort">
<option value="score">Score </option>
<option value="time">Time </option>
@ -130,125 +141,128 @@ headers to circumvent those policies.<br>
<option value="revtime">Reverse Time </option>
<option value="revtitle">Reverse Title </option>
</select>
</font> <input type="hidden" name="config" value="htdig"> <input
type="hidden" name="restrict"
</font> <input type="hidden" name="config" value="htdig">
<input type="hidden" name="restrict"
value="[http://mail.shorewall.net/pipermail/.*]"> <input type="hidden"
name="exclude" value=""> <br>
Search: <input type="text" size="30" name="words" value=""> <input
type="submit" value="Search"> </p>
</form>
<h2 align="left"><font color="#ff0000">Please do not try to download the entire
Archive -- it is 75MB (and growing daily) and my slow DSL line simply won't
stand the traffic. If I catch you, you will be blacklisted.<br>
</font></h2>
Search: <input type="text" size="30" name="words"
value=""> <input type="submit" value="Search"> </p>
</form>
<h2 align="left"><font color="#ff0000">Please do not try to download the
entire Archive -- it is 75MB (and growing daily) and my slow DSL line simply
won't stand the traffic. If I catch you, you will be blacklisted.<br>
</font></h2>
<h2 align="left">Shorewall CA Certificate</h2>
If you want to trust X.509 certificates issued by Shoreline Firewall
(such as the one used on my web site), you may <a
href="Shorewall_CA_html.html">download and install my CA certificate</a>
in your browser. If you don't wish to trust my certificates then you
can either use unencrypted access when subscribing to Shorewall mailing
lists or you can use secure access (SSL) and accept the server's certificate
when prompted by your browser.<br>
If you want to trust X.509 certificates issued by Shoreline
Firewall (such as the one used on my web site), you may <a
href="Shorewall_CA_html.html">download and install my CA certificate</a>
in your browser. If you don't wish to trust my certificates then you
can either use unencrypted access when subscribing to Shorewall mailing
lists or you can use secure access (SSL) and accept the server's certificate
when prompted by your browser.<br>
<h2 align="left">Shorewall Users Mailing List</h2>
<p align="left">The Shorewall Users Mailing list provides a way for users
to get answers to questions and to report problems. Information of
general interest to the Shorewall user community is also posted to
this list.</p>
<p align="left"><b>Before posting a problem report to this list, please see
the <a href="support.htm">problem reporting guidelines</a>.</b></p>
<p align="left">The Shorewall Users Mailing list provides a way for users
to get answers to questions and to report problems. Information of
general interest to the Shorewall user community is also posted to this
list.</p>
<p align="left"><b>Before posting a problem report to this list, please see
the <a href="support.htm">problem reporting guidelines</a>.</b></p>
<p align="left">To subscribe to the mailing list, go to <a
href="http://mail.shorewall.net/mailman/listinfo/shorewall-users">http://mail.shorewall.net/mailman/listinfo/shorewall-users</a>
SSL: <a
href="http://mail.shorewall.net/mailman/listinfo/shorewall-users">http://mail.shorewall.net/mailman/listinfo/shorewall-users</a>
SSL: <a
href="https://mail.shorewall.net/mailman/listinfo/shorewall-users"
target="_top">https//mail.shorewall.net/mailman/listinfo/shorewall-users</a></p>
<p align="left">To post to the list, post to <a
href="mailto:shorewall-users@shorewall.net">shorewall-users@shorewall.net</a>.</p>
<p align="left">The list archives are at <a
href="http://mail.shorewall.net/pipermail/shorewall-users/index.html">http://mail.shorewall.net/pipermail/shorewall-users</a>.</p>
<p align="left">Note that prior to 1/1/2002, the mailing list was hosted
at <a href="http://sourceforge.net">Sourceforge</a>. The archives from that
list may be found at <a
<p align="left">Note that prior to 1/1/2002, the mailing list was hosted at
<a href="http://sourceforge.net">Sourceforge</a>. The archives from that list
may be found at <a
href="http://www.geocrawler.com/lists/3/Sourceforge/9327/0/">www.geocrawler.com/lists/3/Sourceforge/9327/0/</a>.</p>
<h2 align="left">Shorewall Announce Mailing List</h2>
<p align="left">This list is for announcements of general interest to the
Shorewall community. To subscribe, go to <a
href="http://mail.shorewall.net/mailman/listinfo/shorewall-announce">http://mail.shorewall.net/mailman/listinfo/shorewall-announce</a>
SSL: <a
<p align="left">This list is for announcements of general interest to the
Shorewall community. To subscribe, go to <a
href="http://mail.shorewall.net/mailman/listinfo/shorewall-announce">http://mail.shorewall.net/mailman/listinfo/shorewall-announce</a>
SSL: <a
href="https://mail.shorewall.net/mailman/listinfo/shorewall-announce"
target="_top">https//mail.shorewall.net/mailman/listinfo/shorewall-announce.<br>
</a><br>
The list archives are at <a
</a><br>
The list archives are at <a
href="http://mail.shorewall.net/pipermail/shorewall-announce">http://mail.shorewall.net/pipermail/shorewall-announce</a>.</p>
<h2 align="left">Shorewall Development Mailing List</h2>
<p align="left">The Shorewall Development Mailing list provides a forum for
the exchange of ideas about the future of Shorewall and for coordinating
ongoing Shorewall Development.</p>
<p align="left">The Shorewall Development Mailing list provides a forum for
the exchange of ideas about the future of Shorewall and for coordinating
ongoing Shorewall Development.</p>
<p align="left">To subscribe to the mailing list, go to <a
href="http://mail.shorewall.net/mailman/listinfo/shorewall-devel">http://mail.shorewall.net/mailman/listinfo/shorewall-devel</a>
SSL: <a
href="http://mail.shorewall.net/mailman/listinfo/shorewall-devel">http://mail.shorewall.net/mailman/listinfo/shorewall-devel</a>
SSL: <a
href="https://mail.shorewall.net/mailman/listinfo/shorewall-devel"
target="_top">https//mail.shorewall.net/mailman/listinfo/shorewall-devel.</a><br>
To post to the list, post to <a
To post to the list, post to <a
href="mailto:shorewall-devel@shorewall.net">shorewall-devel@shorewall.net</a>. </p>
<p align="left">The list archives are at <a
href="http://mail.shorewall.net/pipermail/shorewall-devel">http://mail.shorewall.net/pipermail/shorewall-devel</a>.</p>
<h2 align="left"><a name="Unsubscribe"></a>How to Unsubscribe from one of
the Mailing Lists</h2>
<p align="left">There seems to be near-universal confusion about unsubscribing
from Mailman-managed lists although Mailman 2.1 has attempted to make
this less confusing. To unsubscribe:</p>
<h2 align="left"><a name="Unsubscribe"></a>How to Unsubscribe from one of
the Mailing Lists</h2>
<p align="left">There seems to be near-universal confusion about unsubscribing
from Mailman-managed lists although Mailman 2.1 has attempted to make
this less confusing. To unsubscribe:</p>
<ul>
<li>
<p align="left">Follow the same link above that you used to subscribe
to the list.</p>
</li>
<li>
<p align="left">Down at the bottom of that page is the following text:
" To <b>unsubscribe</b> from <i>&lt;list name&gt;</i>, get a password
reminder, or change your subscription options enter your subscription
email address:". Enter your email address in the box and click
on the "<b>Unsubscribe</b> or edit options" button.</p>
</li>
<li>
<p align="left">There will now be a box where you can enter your password
and click on "Unsubscribe"; if you have forgotten your password, there
is another button that will cause your password to be emailed to you.</p>
</li>
<li>
<p align="left">Follow the same link above that you used to subscribe
to the list.</p>
</li>
<li>
<p align="left">Down at the bottom of that page is the following text:
" To <b>unsubscribe</b> from <i>&lt;list name&gt;</i>, get a password
reminder, or change your subscription options enter your subscription
email address:". Enter your email address in the box and click
on the "<b>Unsubscribe</b> or edit options" button.</p>
</li>
<li>
<p align="left">There will now be a box where you can enter your password
and click on "Unsubscribe"; if you have forgotten your password, there
is another button that will cause your password to be emailed to you.</p>
</li>
</ul>
<hr>
<hr>
<h2 align="left">Frustrated by having to Rebuild Mailman to use it with Postfix?</h2>
<p align="left"><a href="gnu_mailman.htm">Check out these instructions</a></p>
<p align="left"><font size="2">Last updated 12/29/2002 - <a
<p align="left"><font size="2">Last updated 12/31/2002 - <a
href="support.htm">Tom Eastep</a></font></p>
<p align="left"><font face="Trebuchet MS"><a href="copyright.htm"> <font
size="2">Copyright</font> © <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font><br>
</p>
<p align="left"><a href="copyright.htm"> <font size="2">Copyright</font>
© <font size="2">2001, 2002 Thomas M. Eastep.</font></a><br>
</p>
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<p align="left"><font size="2">Last updated 12/17/2002 02:51 GMT - <a
href="support.htm">Tom Eastep</a></font></p>
<p align="left"><a href="copyright.htm"> <font face="Trebuchet MS"> <font
size="2">Copyright</font> © <font size="2">2002 Thomas M. Eastep.</font></font></a></p>
<p align="left"><a href="copyright.htm"> <font
size="2">Copyright</font> © <font size="2">2002 Thomas M. Eastep.</font></a></p>
<p align="left"> </p>
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type"
content="text/html; charset=windows-1252">
<title>My Shorewall Configuration</title>
<meta name="GENERATOR" content="Microsoft FrontPage 5.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<meta name="Microsoft Theme" content="none">
</head>
<body>
<table border="0" cellpadding="0" cellspacing="0"
style="border-collapse: collapse;" width="100%" id="AutoNumber1"
bgcolor="#400169" height="90">
<tbody>
<tr>
<td width="100%">
<tbody>
<tr>
<td width="100%">
<h1 align="center"><font color="#ffffff">About My Network</font></h1>
</td>
</tr>
</tbody>
</table>
<blockquote> </blockquote>
<h1>My Current Network </h1>
</td>
</tr>
<blockquote>
<p> I have DSL service and have 5 static IP addresses (206.124.146.176-180).
My DSL "modem" (<a href="http://www.fujitsu.com">Fujitsu</a> Speedport)
is connected to eth0. I have a local network connected to eth2 (subnet
</tbody>
</table>
<blockquote> </blockquote>
<h1>My Current Network </h1>
<blockquote>
<p><big><font color="#ff0000"><b>Warning: </b></font><b><small>I</small></b></big><big><b><small>
use a combination of Static NAT and Proxy ARP, neither of which are relevant
to a simple configuration with a single public IP address.</small></b></big><big><b><small>
If you have just a single public IP address, most of what you see here won't
apply to your setup so beware of copying parts of this configuration and
expecting them to work for you. They may or may not work in your setup. </small></b></big><br>
</p>
<p> I have DSL service and have 5 static IP addresses (206.124.146.176-180).
My DSL "modem" (<a href="http://www.fujitsu.com">Fujitsu</a> Speedport)
is connected to eth0. I have a local network connected to eth2 (subnet
192.168.1.0/24) and a DMZ connected to eth1 (192.168.2.0/24). </p>
<p> I use:<br>
</p>
</p>
<ul>
<li>Static NAT for ursa (my XP System) - Internal address 192.168.1.5
and external address 206.124.146.178.</li>
<li>Proxy ARP for wookie (my Linux System). This system has two IP
addresses: 192.168.1.3/24 and 206.124.146.179/24.</li>
<li>SNAT through the primary gateway address (206.124.146.176) for 
my Wife's system (tarry) and the Wireless Access Point (wap)</li>
<li>Static NAT for ursa (my XP System) - Internal address 192.168.1.5
and external address 206.124.146.178.</li>
<li>Proxy ARP for wookie (my Linux System). This system has two
IP addresses: 192.168.1.3/24 and 206.124.146.179/24.</li>
<li>SNAT through the primary gateway address (206.124.146.176)
for  my Wife's system (tarry) and the Wireless Access Point (wap)</li>
</ul>
<p> The firewall runs on a 128MB PII/233 with RH7.2 and Kernel 2.4.20-pre6.</p>
<p> Wookie runs Samba and acts as the a WINS server.  Wookie is in its
own 'whitelist' zone called 'me'.</p>
<p> My laptop (eastept1) is connected to eth3 using a cross-over cable.
It runs its own <a href="http://www.sygate.com"> Sygate</a> firewall software
and is managed by Proxy ARP. It connects to the local network through
<p> Wookie runs Samba and acts as the a WINS server.  Wookie is in its
own 'whitelist' zone called 'me'.</p>
<p> My laptop (eastept1) is connected to eth3 using a cross-over cable.
It runs its own <a href="http://www.sygate.com"> Sygate</a> firewall software
and is managed by Proxy ARP. It connects to the local network through
the PopTop server running on my firewall. </p>
<p> The single system in the DMZ (address 206.124.146.177) runs postfix,
Courier IMAP (imaps and pop3), DNS, a Web server (Apache) and an FTP server
(Pure-ftpd). The system also runs fetchmail to fetch our email from our
old and current ISPs. That server is managed through Proxy ARP.</p>
<p> The firewall system itself runs a DHCP server that serves the local
network.</p>
<p> The single system in the DMZ (address 206.124.146.177) runs postfix,
Courier IMAP (imaps and pop3), DNS, a Web server (Apache) and an FTP server
(Pure-ftpd). The system also runs fetchmail to fetch our email from
our old and current ISPs. That server is managed through Proxy ARP.</p>
<p> The firewall system itself runs a DHCP server that serves the local
network.</p>
<p> All administration and publishing is done using ssh/scp.</p>
<p> I run an SNMP server on my firewall to serve <a
href="http://www.ee.ethz.ch/%7Eoetiker/webtools/mrtg/"> MRTG</a> running
in the DMZ.</p>
href="http://www.ee.ethz.ch/%7Eoetiker/webtools/mrtg/"> MRTG</a> running
in the DMZ.</p>
<p align="center"> <img border="0"
src="images/network.png" width="764" height="846">
</p>
</p>
<p> </p>
<p>The ethernet interface in the Server is configured
with IP address 206.124.146.177, netmask
255.255.255.0. The server's default gateway is
206.124.146.254 (Router at my ISP. This is the same
default gateway used by the firewall itself). On the firewall,
Shorewall automatically adds a host route to
206.124.146.177 through eth1 (192.168.2.1) because
of the entry in /etc/shorewall/proxyarp (see
<p>The ethernet interface in the Server is configured
with IP address 206.124.146.177, netmask
255.255.255.0. The server's default gateway is
206.124.146.254 (Router at my ISP. This is the same
default gateway used by the firewall itself). On the firewall,
Shorewall automatically adds a host route to
206.124.146.177 through eth1 (192.168.2.1) because
of the entry in /etc/shorewall/proxyarp (see
below).</p>
<p>A similar setup is used on eth3 (192.168.3.1) which
interfaces to my laptop (206.124.146.180).</p>
<p><font color="#ff0000" size="5"> Note: My files
use features not available before Shorewall
version 1.3.4.</font></p>
</blockquote>
<p>A similar setup is used on eth3 (192.168.3.1) which
interfaces to my laptop (206.124.146.180).<br>
</p>
<p>Ursa (192.168.1.5 AKA 206.124.146.178) runs a PPTP server for Road Warrior
access.<br>
</p>
<p><font color="#ff0000" size="5"></font></p>
</blockquote>
<h3>Shorewall.conf</h3>
<pre> SUBSYSLOCK=/var/lock/subsys/shorewall<br> STATEDIR=/var/state/shorewall<br><br> LOGRATE=<br> LOGBURST=<br><br> ADD_IP_ALIASES="Yes"<br><br> CLAMPMSS=Yes<br><br> MULTIPORT=Yes</pre>
<h3>Zones File:</h3>
<pre><font face="Courier" size="2"> #ZONE DISPLAY COMMENTS<br> net Internet Internet<br> me Eastep My Workstation<br> loc Local Local networks<br> dmz DMZ Demilitarized zone<br> tx Texas Peer Network in Dallas Texas<br> #LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE</font></pre>
<h3>Interfaces File: </h3>
<blockquote>
<p> This is set up so that I can start the firewall before bringing up
my Ethernet interfaces. </p>
</blockquote>
<blockquote>
<p> This is set up so that I can start the firewall before bringing up my
Ethernet interfaces. </p>
</blockquote>
<pre><font face="Courier" size="2"> #ZONE INTERFACE BROADCAST OPTIONS<br> net eth0 206.124.146.255 routefilter,norfc1918,blacklist,filterping<br> loc eth2 192.168.1.255 dhcp,filterping,maclist<br> dmz eth1 206.124.146.255 filterping<br> net eth3 206.124.146.255 filterping,blacklist<br> - texas - filterping<br> loc ppp+ - filterping<br> #LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE</font></pre>
<h3>Hosts File: </h3>
<pre><font face="Courier" size="2"> #ZONE HOST(S) OPTIONS<br> me eth2:192.168.1.3,eth2:206.124.146.179<br> tx texas:192.168.9.0/24<br> #LAST LINE -- ADD YOUR ENTRIES ABOVE -- DO NOT REMOVE</font></pre>
<h3>Routestopped File:</h3>
<pre><font face="Courier" size="2"> #INTERFACE HOST(S)<br> eth1 206.124.146.177<br> eth2 -<br> eth3 206.124.146.180</font></pre>
<h3>Common File: </h3>
<pre><font size="2" face="Courier"> . /etc/shorewall/common.def<br> run_iptables -A common -p udp --sport 53 -mstate --state NEW -j DROP<br> run_iptables -A common -p tcp --dport 113 -j REJECT</font></pre>
<pre><font size="2" face="Courier"> . /etc/shorewall/common.def<br> run_iptables -A common -p udp --sport 53 -mstate --state NEW -j DROP<br></font></pre>
<h3>Policy File:</h3>
<pre><font size="2" face="Courier">
#SOURCE DEST POLICY LOG LEVEL LIMIT:BURST
me all ACCEPT
@ -136,40 +146,42 @@ my Ethernet interfaces. </p>
all me CONTINUE #<font
color="#ff0000">WARNING: You must be running Shorewall 1.3.1 or later for<br> </font>#<font
color="#ff0000"> this policy to work as expected!!!</font> <br> loc loc ACCEPT<br> loc net ACCEPT<br> $FW loc ACCEPT<br> $FW tx ACCEPT<br> loc tx ACCEPT<br> loc fw REJECT<br> net net ACCEPT<br> net all DROP info 10/sec:40<br> all all REJECT info<br> #LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOTE</font></pre>
<h3>Masq File: </h3>
<blockquote>
<p> Although most of our internal systems use static NAT, my wife's system
(192.168.1.4) uses IP Masquerading (actually SNAT) as do visitors with
laptops. Also, I masquerade wookie to the peer subnet in Texas.</p>
</blockquote>
<blockquote>
<p> Although most of our internal systems use static NAT, my wife's system
(192.168.1.4) uses IP Masquerading (actually SNAT) as do visitors with
laptops. Also, I masquerade wookie to the peer subnet in Texas.</p>
</blockquote>
<pre><font size="2" face="Courier"> #INTERFACE SUBNET ADDRESS<br> eth0 192.168.1.0/24 206.124.146.176<br> texas 206.124.146.179 192.168.1.254<br> #LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE</font></pre>
<h3>NAT File: </h3>
<pre><font size="2" face="Courier"> #EXTERNAL INTERFACE INTERNAL ALL LOCAL<br> 206.124.146.178 eth0 192.168.1.5 No No<br> 206.124.146.179 eth0 192.168.1.3 No No<br> #LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE</font></pre>
<h3>Proxy ARP File:</h3>
<pre><font face="Courier" size="2"> #ADDRESS INTERFACE EXTERNAL HAVEROU</font><font
face="Courier" size="2">TE<br> 206.124.146.177 eth1 eth0 No<br> 206.124.146.180 eth3 eth0 No<br></font><font
face="Courier" size="2"> #LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE</font></pre>
<h3>Rules File (The shell variables
are set in /etc/shorewall/params):</h3>
<pre><font face="Courier" size="2"> #ACTION SOURCE DEST PROTO DEST SOURCE ORIGINAL<br> # PORT(S) PORT(S) PORT(S) DEST<br> #<br> # Local Network to Internet - Reject attempts by Trojans to call home<br> #<br> REJECT:info loc net tcp 6667<br> #<br> # Local Network to Firewall <br> #<br> ACCEPT loc fw tcp ssh<br> ACCEPT loc fw tcp time<br> #<br> # Local Network to DMZ <br> #<br> ACCEPT loc dmz udp domain<br> ACCEPT loc dmz tcp smtp<br> ACCEPT loc dmz tcp domain<br> ACCEPT loc dmz tcp ssh<br> ACCEPT loc dmz tcp auth<br> ACCEPT loc dmz tcp imap<br> ACCEPT loc dmz tcp https<br> ACCEPT loc dmz tcp imaps<br> ACCEPT loc dmz tcp cvspserver<br> ACCEPT loc dmz tcp www<br> ACCEPT loc dmz tcp ftp<br> ACCEPT loc dmz tcp pop3<br> ACCEPT loc dmz icmp echo-request<br> #<br> # Internet to DMZ <br> #<br> ACCEPT net dmz tcp www<br> ACCEPT net dmz tcp smtp<br> ACCEPT net dmz tcp ftp<br> ACCEPT net dmz tcp auth<br> ACCEPT net dmz tcp https<br> ACCEPT net dmz tcp imaps<br> ACCEPT net dmz tcp domain<br> ACCEPT net dmz tcp cvspserver<br> ACCEPT net dmz udp domain<br> ACCEPT net dmz icmp echo-request<br> ACCEPT net:$MIRRORS dmz tcp rsync<br> #<br> # Net to Me (ICQ chat and file transfers) <br> #<br> ACCEPT net me tcp 4000:4100<br> #<br> # Net to Local <br> #<br> ACCEPT net loc tcp auth<br> REJECT net loc tcp www<br> #<br> # DMZ to Internet<br> #<br> ACCEPT dmz net icmp echo-request<br> ACCEPT dmz net tcp smtp<br> ACCEPT dmz net tcp auth<br> ACCEPT dmz net tcp domain<br> ACCEPT dmz net tcp www<br> ACCEPT dmz net tcp https<br> ACCEPT dmz net tcp whois<br> ACCEPT dmz net tcp echo<br> ACCEPT dmz net udp domain<br> ACCEPT dmz net:$NTPSERVERS udp ntp<br> ACCEPT dmz net:$POPSERVERS tcp pop3<br> #<br> # The following compensates for a bug, either in some FTP clients or in the<br> # Netfilter connection tracking code that occasionally denies active mode<br> # FTP clients<br> #<br> ACCEPT:info dmz net tcp 1024: 20<br> #<br> # DMZ to Firewall -- snmp<br> #<br> ACCEPT dmz fw tcp snmp<br> ACCEPT dmz fw udp snmp<br> #<br> # DMZ to Local Network <br> #<br> ACCEPT dmz loc tcp smtp<br> ACCEPT dmz loc tcp auth<br> ACCEPT dmz loc icmp echo-request<br> # Internet to Firewall<br> #<br> ACCEPT net fw tcp 1723<br> ACCEPT net fw gre<br> REJECT net fw tcp www<br> #<br> # Firewall to Internet<br> #<br> ACCEPT fw net:$NTPSERVERS udp ntp<br> ACCEPT fw net udp domain<br> ACCEPT fw net tcp domain<br> ACCEPT fw net tcp www<br> ACCEPT fw net tcp https<br> ACCEPT fw net tcp ssh<br> ACCEPT fw net tcp whois<br> ACCEPT fw net icmp echo-request<br> #<br> # Firewall to DMZ<br> #<br> ACCEPT fw dmz tcp www<br> ACCEPT fw dmz tcp ftp<br> ACCEPT fw dmz tcp ssh<br> ACCEPT fw dmz tcp smtp<br> ACCEPT fw dmz udp domain<br> #<br> # Let Texas Ping<br> #<br> ACCEPT tx fw icmp echo-request<br> ACCEPT tx loc icmp echo-request<br><br> #LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE</font></pre>
<p><font size="2"> Last updated 10/14/2002 - </font><font size="2">
<a href="support.htm">Tom Eastep</a></font>
</p>
<font face="Trebuchet MS"><a href="copyright.htm"><font size="2">Copyright</font>
© <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font><br>
<br>
<br>
<br>
face="Courier" size="2">TE<br> 206.124.146.177 eth1 eth0 No<br> 206.124.146.180 eth3 eth0 No<br></font><pre><font
face="Courier" size="2"> #LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE</font></pre></pre>
<h3>Tunnels File (Shell variable TEXAS set in /etc/shorewall/params):</h3>
<pre><small> #TYPE          ZONE    GATEWAY</small><small> <br> gre             net     $TEXAS</small><small><br> #LAST LINE -- DO NOT REMOVE<br></small></pre>
<h3>Rules File (The shell variables
are set in /etc/shorewall/params):</h3>
<pre><font face="Courier" size="2"> #ACTION SOURCE DEST PROTO DEST SOURCE ORIGINAL<br> # PORT(S) PORT(S) PORT(S) DEST<br> #<br> # Local Network to Internet - Reject attempts by Trojans to call home<br> #<br> REJECT:info loc net tcp 6667<br> #<br> # Local Network to Firewall <br> #<br> ACCEPT loc fw tcp ssh<br> ACCEPT loc fw tcp time<br> #<br> # Local Network to DMZ <br> #<br> ACCEPT loc dmz udp domain<br> ACCEPT loc dmz tcp smtp<br> ACCEPT loc dmz tcp domain<br> ACCEPT loc dmz tcp ssh<br> ACCEPT loc dmz tcp auth<br> ACCEPT loc dmz tcp imap<br> ACCEPT loc dmz tcp https<br> ACCEPT loc dmz tcp imaps<br> ACCEPT loc dmz tcp cvspserver<br> ACCEPT loc dmz tcp www<br> ACCEPT loc dmz tcp ftp<br> ACCEPT loc dmz tcp pop3<br> ACCEPT loc dmz icmp echo-request<br> #<br> # Internet to DMZ <br> #<br> ACCEPT net dmz tcp www<br> ACCEPT net dmz tcp smtp<br> ACCEPT net dmz tcp ftp<br> ACCEPT net dmz tcp auth<br> ACCEPT net dmz tcp https<br> ACCEPT net dmz tcp imaps<br> ACCEPT net dmz tcp domain<br> ACCEPT net dmz tcp cvspserver<br> ACCEPT net dmz udp domain<br> ACCEPT net dmz icmp echo-request<br> ACCEPT net:$MIRRORS dmz tcp rsync<br> #<br> # Net to Me (ICQ chat and file transfers) <br> #<br> ACCEPT net me tcp 4000:4100<br> #<br> # Net to Local <br> #<br> ACCEPT net loc tcp auth<br> REJECT net loc tcp www<br> ACCEPT net loc:192.168.1.5 tcp 1723<br> ACCEPT net loc:192.168.1.5 gre<br> #<br> # DMZ to Internet<br> #<br> ACCEPT dmz net icmp echo-request<br> ACCEPT dmz net tcp smtp<br> ACCEPT dmz net tcp auth<br> ACCEPT dmz net tcp domain<br> ACCEPT dmz net tcp www<br> ACCEPT dmz net tcp https<br> ACCEPT dmz net tcp whois<br> ACCEPT dmz net tcp echo<br> ACCEPT dmz net udp domain<br> ACCEPT dmz net:$NTPSERVERS udp ntp<br> ACCEPT dmz net:$POPSERVERS tcp pop3<br> #<br> # The following compensates for a bug, either in some FTP clients or in the<br> # Netfilter connection tracking code that occasionally denies active mode<br> # FTP clients<br> #<br> ACCEPT:info dmz net tcp 1024: 20<br> #<br> # DMZ to Firewall -- snmp<br> #<br> ACCEPT dmz fw tcp snmp<br> ACCEPT dmz fw udp snmp<br> #<br> # DMZ to Local Network <br> #<br> ACCEPT dmz loc tcp smtp<br> ACCEPT dmz loc tcp auth<br> ACCEPT dmz loc icmp echo-request<br> # Internet to Firewall<br> #<br> REJECT net fw tcp www<br> #<br> # Firewall to Internet<br> #<br> ACCEPT fw net:$NTPSERVERS udp ntp<br> ACCEPT fw net udp domain<br> ACCEPT fw net tcp domain<br> ACCEPT fw net tcp www<br> ACCEPT fw net tcp https<br> ACCEPT fw net tcp ssh<br> ACCEPT fw net tcp whois<br> ACCEPT fw net icmp echo-request<br> #<br> # Firewall to DMZ<br> #<br> ACCEPT fw dmz tcp www<br> ACCEPT fw dmz tcp ftp<br> ACCEPT fw dmz tcp ssh<br> ACCEPT fw dmz tcp smtp<br> ACCEPT fw dmz udp domain<br> #<br> # Let Texas Ping<br> #<br> ACCEPT tx fw icmp echo-request<br> ACCEPT tx loc icmp echo-request<br><br> #LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE</font></pre>
<p><font size="2"> Last updated 1/12/2003 - </font><font size="2">
<a href="support.htm">Tom Eastep</a></font>
</p>
<a href="copyright.htm"><font size="2">Copyright</font> ©
<font size="2">2001, 2002, 2003 Thomas M. Eastep.</font></a><br>
<br>
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@ -26,11 +26,11 @@ way. This page describes how it now works.<br>
There are several aspects to Shorewall Ping management:<br>
<ol>
<li>The <b>noping</b> and <b>filterping </b>interface options in <a
href="file:///home/teastep/Shorewall-docs/Documentation.htm#Interfaces">/etc/shorewall/interfaces</a>.</li>
href="Documentation.htm#Interfaces">/etc/shorewall/interfaces</a>.</li>
<li>The <b>FORWARDPING</b> option in<a
href="file:///home/teastep/Shorewall-docs/Documentation.htm#Conf"> /etc/shorewall/shorewall.conf</a>.</li>
href="Documentation.htm#Conf"> /etc/shorewall/shorewall.conf</a>.</li>
<li>Explicit rules in <a
href="file:///home/teastep/Shorewall-docs/Documentation.htm#Rules">/etc/shorewall/rules</a>.</li>
href="Documentation.htm#Rules">/etc/shorewall/rules</a>.</li>
</ol>
There are two cases to consider:<br>
<ol>
@ -81,10 +81,10 @@ then the request is responded to with an ICMP echo-reply.</li>
is either rejected or simply ignored.</li>
</ol>
<p><font size="2">Updated 12/13/2002 - <a
href="file:///home/teastep/Shorewall-docs/support.htm">Tom Eastep</a> </font></p>
href="support.htm">Tom Eastep</a> </font></p>
<p><font face="Trebuchet MS"><a href="copyright.htm"><font size="2">Copyright</font>
&copy; <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font></p>
<p><a href="copyright.htm"><font size="2">Copyright</font>
&copy; <font size="2">2001, 2002 Thomas M. Eastep.</font></a></p>
<br>
</body>
</html>

4
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@ -187,8 +187,8 @@ Shorewall starts, then you should include the port list in /etc/modules.conf:<br
<p><font size="2">Last updated 11/10/2002 - </font><font size="2"> <a
href="support.htm">Tom Eastep</a></font> </p>
<font face="Trebuchet MS"><a href="copyright.htm"><font size="2">Copyright</font>
© <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font><br>
<a href="copyright.htm"><font size="2">Copyright</font>
© <font size="2">2001, 2002 Thomas M. Eastep.</font></a><br>
<br>
<br>
</body>

527
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@ -5,6 +5,7 @@
<meta http-equiv="Content-Type"
content="text/html; charset=windows-1252">
<title>Shoreline Firewall (Shorewall) 1.3</title>
@ -12,78 +13,86 @@
<base target="_self">
<base target="_self">
</head>
<body>
<table border="0" cellpadding="0" cellspacing="4"
style="border-collapse: collapse;" width="100%" id="AutoNumber3"
bgcolor="#4b017c">
<tbody>
<tr>
<tbody>
<td width="100%" height="90">
<tr>
<td width="100%" height="90">
<h1 align="center"> <font size="4"><i> <a
href="http://www.cityofshoreline.com"> <img vspace="4" hspace="4"
alt="Shorwall Logo" height="70" width="85" align="left"
src="images/washington.jpg" border="0">
</a></i></font><font color="#ffffff">Shorewall 1.3 -
<font size="4">"<i>iptables made easy"</i></font></font></h1>
</a></i></font><font color="#ffffff">Shorewall 1.3
- <font size="4">"<i>iptables made easy"</i></font></font></h1>
<div align="center"><a
href="http://shorewall.sf.net/1.2/index.html" target="_top"><font
color="#ffffff">Shorewall 1.2 Site here</font></a><br>
</div>
<br>
</td>
</div>
</tr>
<br>
</td>
</tr>
</tbody>
</table>
<div align="center">
<center>
<table border="0" cellpadding="0" cellspacing="0"
style="border-collapse: collapse;" width="100%" id="AutoNumber4">
<tbody>
<tr>
<tbody>
<td width="90%">
<tr>
<td width="90%">
<h2 align="left">What is it?</h2>
@ -93,7 +102,7 @@
<p>The Shoreline Firewall, more commonly known as "Shorewall", is
a <a href="http://www.netfilter.org">Netfilter</a> (iptables) based
firewall that can be used on a dedicated firewall system, a multi-function
@ -106,26 +115,26 @@ firewall that can be used on a dedicated firewall system, a multi-functio
<p>This program is free software; you can redistribute it and/or modify
it under the terms of <a
it under the terms of <a
href="http://www.gnu.org/licenses/gpl.html">Version 2 of the GNU
General Public License</a> as published by the Free Software Foundation.<br>
<br>
<br>
This program is distributed in the hope that it
will be useful, but WITHOUT ANY WARRANTY; without
even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public
License for more details.<br>
This program is distributed in the hope that
it will be useful, but WITHOUT ANY WARRANTY;
without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.<br>
<br>
<br>
You should have received a copy of the GNU General
Public License along with this program; if not,
write to the Free Software Foundation, Inc., 675
Mass Ave, Cambridge, MA 02139, USA</p>
You should have received a copy of the GNU
General Public License along with this program;
if not, write to the Free Software Foundation,
Inc., 675 Mass Ave, Cambridge, MA 02139, USA</p>
@ -134,8 +143,8 @@ License for more details.<br>
<p><a href="copyright.htm">Copyright 2001, 2002 Thomas M. Eastep</a></p>
<p><a href="copyright.htm">Copyright 2001, 2002, 2003 Thomas M. Eastep</a></p>
@ -144,23 +153,27 @@ License for more details.<br>
<p> <a href="http://leaf.sourceforge.net" target="_top"><img
border="0" src="images/leaflogo.gif" width="49" height="36">
</a>Jacques Nilo and Eric Wolzak have a LEAF
(router/firewall/gateway on a floppy, CD or compact flash) distribution
called <i>Bering</i> that features Shorewall-1.3.10
and Kernel-2.4.18. You can find their work at:
<a href="http://leaf.sourceforge.net/devel/jnilo"> http://leaf.sourceforge.net/devel/jnilo<br>
</a></p>
</a>Jacques Nilo and Eric Wolzak have
a LEAF (router/firewall/gateway on a floppy, CD or compact
flash) distribution called <i>Bering</i> that
features Shorewall-1.3.10 and Kernel-2.4.18. You
can find their work at: <a
href="http://leaf.sourceforge.net/devel/jnilo"> http://leaf.sourceforge.net/devel/jnilo<br>
</a></p>
<p><b>Congratulations to Jacques and Eric on the recent release of
Bering 1.0 Final!!! </b><br>
</p>
</p>
<h2>This is a mirror of the main Shorewall web site at SourceForge
(<a href="http://shorewall.sf.net" target="_top">http://shorewall.sf.net</a>)</h2>
@ -173,7 +186,8 @@ Bering 1.0 Final!!! </b><br>
<h2>News</h2>
@ -182,194 +196,295 @@ Bering 1.0 Final!!! </b><br>
<h2></h2>
<p><b>12/27/2002 - Shorewall 1.3.12 Released</b><b> </b><b><img
border="0" src="images/new10.gif" width="28" height="12" alt="(New)">
</b></p>
<p><b>1/13/2003 - Shorewall 1.3.13</b><b> </b><b><img border="0"
src="images/new10.gif" width="28" height="12" alt="(New)">
</b><br>
</p>
<p> Features include:<br>
</p>
<p>Just includes a few things that I had on the burner:<br>
</p>
<ol>
<li>"shorewall refresh" now reloads the traffic shaping rules (tcrules
and tcstart).</li>
<li>"shorewall debug [re]start" now turns off debugging after an
error occurs. This places the point of the failure near the end of the
trace rather than up in the middle of it.</li>
<li>"shorewall [re]start" has been speeded up by more than 40% with
my configuration. Your milage may vary.</li>
<li>A "shorewall show classifiers" command has been added which shows
the current packet classification filters. The output from this command
is also added as a separate page in "shorewall monitor"</li>
<li>ULOG (must be all caps) is now accepted as a valid syslog level
and causes the subject packets to be logged using the ULOG target rather
than the LOG target. This allows you to run ulogd (available from <a
href="http://www.gnumonks.org/projects/ulogd">http://www.gnumonks.org/projects/ulogd</a>)
and log all Shorewall messages <a
href="shorewall_logging.html">to a separate log file</a>.</li>
<li>If you are running a kernel that has a FORWARD chain in the mangle
table ("shorewall show mangle" will show you the chains in the mangle table),
you can set MARK_IN_FORWARD_CHAIN=Yes in <a
href="Documentation.htm#Conf">shorewall.conf</a>. This allows for marking
input packets based on their destination even when you are using Masquerading
or SNAT.</li>
<li>I have cluttered up the /etc/shorewall directory with empty 'init',
'start', 'stop' and 'stopped' files. If you already have a file with one
of these names, don't worry -- the upgrade process won't overwrite your file.</li>
<li>I have added a new RFC1918_LOG_LEVEL variable to <a
href="Documentation.htm#Conf">shorewall.conf</a>. This variable specifies
the syslog level at which packets are logged as a result of entries in the
/etc/shorewall/rfc1918 file. Previously, these packets were always logged
at the 'info' level.<br>
<li>A new 'DNAT-' action has been added for entries in the /etc/shorewall/rules
file. DNAT- is intended for advanced users who wish to minimize the number
of rules that connection requests must traverse.<br>
<br>
A Shorewall DNAT rule actually generates two iptables rules: a header rewriting
rule in the 'nat' table and an ACCEPT rule in the 'filter' table. A DNAT-
rule only generates the first of these rules. This is handy when you have
several DNAT rules that would generate the same ACCEPT rule.<br>
<br>
   Here are three rules from my previous rules file:<br>
<br>
        DNAT   net  dmz:206.124.146.177 tcp smtp - 206.124.146.178<br>
        DNAT   net  dmz:206.124.146.177 tcp smtp - 206.124.146.179<br>
        ACCEPT net  dmz:206.124.146.177 tcp www,smtp,ftp,...<br>
<br>
   These three rules ended up generating _three_ copies of<br>
<br>
         ACCEPT net  dmz:206.124.146.177 tcp smtp<br>
<br>
   By writing the rules this way, I end up with only one copy of the ACCEPT
rule.<br>
<br>
        DNAT-  net  dmz:206.124.146.177 tcp smtp -  206.124.146.178<br>
        DNAT-  net  dmz:206.124.146.177 tcp smtp -  206.124.146.179<br>
        ACCEPT net  dmz:206.124.146.177 tcp www,smtp,ftp,....<br>
<br>
</li>
<li>The 'shorewall check' command now prints out the applicable policy
between each pair of zones.<br>
<br>
</li>
<li>A new CLEAR_TC option has been added to shorewall.conf. If this
option is set to 'No' then Shorewall won't clear the current traffic control
rules during [re]start. This setting is intended for use by people that prefer
to configure traffic shaping when the network interfaces come up rather than
when the firewall is started. If that is what you want to do, set TC_ENABLED=Yes
and CLEAR_TC=No and do not supply an /etc/shorewall/tcstart file. That way,
your traffic shaping rules can still use the 'fwmark' classifier based on
packet marking defined in /etc/shorewall/tcrules.<br>
<br>
</li>
<li>A new SHARED_DIR variable has been added that allows distribution
packagers to easily move the shared directory (default /usr/lib/shorewall).
Users should never have a need to change the value of this shorewall.conf
setting.<br>
</li>
</ol>
<p><b>1/6/2003 -</b><b><big><big><big><big><big><big><big><big> B</big></big></big></big></big><small>U<small>R<small>N<small>O<small>U<small>T</small></small></small></small></small></small></big></big></big></b><b>
</b></p>
<p><b>Until further notice, I will not be involved in either Shorewall
Development or Shorewall Support</b></p>
<p><b>-Tom Eastep</b><br>
</p>
<p><b>12/30/2002 - Shorewall Documentation in PDF Format</b><b>
</b></p>
<p>Juraj Ontkanin has produced a PDF containing the Shorewall 1.3.12
documenation. the PDF may be downloaded from</p>
<p>    <a
href="ftp://slovakia.shorewall.net/mirror/shorewall/pdf/"
target="_self">ftp://slovakia.shorewall.net/mirror/shorewall/pdf/</a><br>
    <a
href="http://slovakia.shorewall.net/pub/shorewall/pdf/">http://slovakia.shorewall.net/pub/shorewall/pdf/</a><br>
</p>
<p><b>12/27/2002 - Shorewall 1.3.12 Released</b><b>
</b></p>
<p> Features include:<br>
</p>
<ol>
<li>"shorewall refresh" now reloads the traffic shaping rules
(tcrules and tcstart).</li>
<li>"shorewall debug [re]start" now turns off debugging after
an error occurs. This places the point of the failure near the end of
the trace rather than up in the middle of it.</li>
<li>"shorewall [re]start" has been speeded up by more than
40% with my configuration. Your milage may vary.</li>
<li>A "shorewall show classifiers" command has been added
which shows the current packet classification filters. The output from
this command is also added as a separate page in "shorewall monitor"</li>
<li>ULOG (must be all caps) is now accepted as a valid syslog
level and causes the subject packets to be logged using the ULOG target
rather than the LOG target. This allows you to run ulogd (available from
<a href="http://www.gnumonks.org/projects/ulogd">http://www.gnumonks.org/projects/ulogd</a>)
and log all Shorewall messages <a href="shorewall_logging.html">to a
separate log file</a>.</li>
<li>If you are running a kernel that has a FORWARD chain
in the mangle table ("shorewall show mangle" will show you the chains
in the mangle table), you can set MARK_IN_FORWARD_CHAIN=Yes in <a
href="Documentation.htm#Conf">shorewall.conf</a>. This allows for marking
input packets based on their destination even when you are using Masquerading
or SNAT.</li>
<li>I have cluttered up the /etc/shorewall directory with
empty 'init', 'start', 'stop' and 'stopped' files. If you already have
a file with one of these names, don't worry -- the upgrade process won't
overwrite your file.</li>
<li>I have added a new RFC1918_LOG_LEVEL variable to <a
href="Documentation.htm#Conf">shorewall.conf</a>. This variable specifies
the syslog level at which packets are logged as a result of entries in
the /etc/shorewall/rfc1918 file. Previously, these packets were always
logged at the 'info' level.<br>
</li>
</ol>
<p><b>12/20/2002 - Shorewall 1.3.12 Beta 3</b><br>
</p>
This version corrects a problem with Blacklist logging. In Beta 2, if BLACKLIST_LOG_LEVEL
was set to anything but ULOG, the firewall would fail to start and "shorewall
refresh" would also fail.<br>
</p>
This version corrects a problem with Blacklist logging. In Beta
2, if BLACKLIST_LOG_LEVEL was set to anything but ULOG, the firewall would
fail to start and "shorewall refresh" would also fail.<br>
<p> You may download the Beta from:<br>
</p>
</p>
<blockquote><a href="http://www.shorewall.net/pub/shorewall/Beta">http://www.shorewall.net/pub/shorewall/Beta</a><br>
<a href="ftp://ftp.shorewall.net/pub/shorewall/Beta"
<a href="ftp://ftp.shorewall.net/pub/shorewall/Beta"
target="_top">ftp://ftp.shorewall.net/pub/shorewall/Beta</a><br>
</blockquote>
</blockquote>
<p><b>12/20/2002 - Shorewall 1.3.12 Beta 2</b><b>
</b></p>
The first public Beta version of Shorewall 1.3.12 is now available (Beta
1 was made available to a limited audience). <br>
<br>
Features include:<br>
<br>
The first public Beta version of Shorewall 1.3.12 is now available
(Beta 1 was made available to a limited audience). <br>
<br>
Features include:<br>
<br>
<ol>
<li>"shorewall refresh" now reloads the traffic shaping rules
(tcrules and tcstart).</li>
<li>"shorewall debug [re]start" now turns off debugging after
an error occurs. This places the point of the failure near the end of the
trace rather than up in the middle of it.</li>
<li>"shorewall [re]start" has been speeded up by more than 40%
with my configuration. Your milage may vary.</li>
<li>A "shorewall show classifiers" command has been added which
shows the current packet classification filters. The output from this command
is also added as a separate page in "shorewall monitor"</li>
<li>ULOG (must be all caps) is now accepted as a valid syslog
level and causes the subject packets to be logged using the ULOG target
rather than the LOG target. This allows you to run ulogd (available from
<a href="http://www.gnumonks.org/projects/ulogd">http://www.gnumonks.org/projects/ulogd</a>)
and log all Shorewall messages <a
href="shorewall_logging.html">to a separate log file</a>.</li>
<li>If you are running a kernel that has a FORWARD chain in
the mangle table ("shorewall show mangle" will show you the chains in the
mangle table), you can set MARK_IN_FORWARD_CHAIN=Yes in shorewall.conf.
This allows for marking input packets based on their destination even when
you are using Masquerading or SNAT.</li>
<li>I have cluttered up the /etc/shorewall directory with empty
'init', 'start', 'stop' and 'stopped' files. If you already have a file
with one of these names, don't worry -- the upgrade process won't overwrite
your file.</li>
<li>"shorewall refresh" now reloads the traffic shaping
rules (tcrules and tcstart).</li>
<li>"shorewall debug [re]start" now turns off debugging
after an error occurs. This places the point of the failure near the
end of the trace rather than up in the middle of it.</li>
<li>"shorewall [re]start" has been speeded up by more
than 40% with my configuration. Your milage may vary.</li>
<li>A "shorewall show classifiers" command has been
added which shows the current packet classification filters. The output
from this command is also added as a separate page in "shorewall monitor"</li>
<li>ULOG (must be all caps) is now accepted as a valid
syslog level and causes the subject packets to be logged using the ULOG
target rather than the LOG target. This allows you to run ulogd (available
from <a href="http://www.gnumonks.org/projects/ulogd">http://www.gnumonks.org/projects/ulogd</a>)
and log all Shorewall messages <a href="shorewall_logging.html">to a
separate log file</a>.</li>
<li>If you are running a kernel that has a FORWARD chain
in the mangle table ("shorewall show mangle" will show you the chains
in the mangle table), you can set MARK_IN_FORWARD_CHAIN=Yes in shorewall.conf.
This allows for marking input packets based on their destination even
when you are using Masquerading or SNAT.</li>
<li>I have cluttered up the /etc/shorewall directory
with empty 'init', 'start', 'stop' and 'stopped' files. If you already
have a file with one of these names, don't worry -- the upgrade process
won't overwrite your file.</li>
</ol>
You may download the Beta from:<br>
You may download the Beta from:<br>
<blockquote><a href="http://www.shorewall.net/pub/shorewall/Beta">http://www.shorewall.net/pub/shorewall/Beta</a><br>
<a href="ftp://ftp.shorewall.net/pub/shorewall/Beta"
<a href="ftp://ftp.shorewall.net/pub/shorewall/Beta"
target="_top">ftp://ftp.shorewall.net/pub/shorewall/Beta</a><br>
</blockquote>
</blockquote>
<p><b>12/12/2002 - Mandrake Multi Network Firewall <a
href="http://www.mandrakesoft.com"><img src="images/logo2.png"
alt="Powered by Mandrake Linux" width="150" height="21" border="0">
</a></b></p>
Shorewall is at the center of MandrakeSoft's recently-announced <a
</a></b></p>
Shorewall is at the center of MandrakeSoft's recently-announced
<a
href="http://www.mandrakestore.com/mdkinc/index.php?PAGE=tab_0/menu_0.php&amp;id_art=250&amp;LANG_=en#GOTO_250">Multi
Network Firewall (MNF)</a> product. Here is the <a
Network Firewall (MNF)</a> product. Here is the <a
href="http://www.mandrakesoft.com/company/press/pr?n=/pr/products/2403">press
release</a>.<br>
release</a>.<br>
<p><b>12/7/2002 - Shorewall Support for Mandrake 9.0</b><b>
</b></p>
<p>Two months and 3 days after I pre-ordered Mandrake 9.0, it was finally
delivered. I have installed 9.0 on one of my systems and I am now in
a position to support Shorewall users who run Mandrake 9.0.</p>
delivered. I have installed 9.0 on one of my systems and I am now
in a position to support Shorewall users who run Mandrake 9.0.</p>
<p><b>12/6/2002 -  Debian 1.3.11a Packages Available</b><br>
</p>
</p>
<p>Apt-get sources listed at <a
href="http://security.dsi.unimi.it/%7Elorenzo/debian.html">http://security.dsi.unimi.it/~lorenzo/debian.html.</a></p>
<p><b>12/3/2002 - Shorewall 1.3.11a</b><b>
</b></p>
<p>This is a bug-fix roll up which includes Roger Aich's fix for DNAT
with excluded subnets (e.g., "DNAT foo!bar ..."). Current 1.3.11 users
who don't need rules of this type need not upgrade to 1.3.11.</p>
with excluded subnets (e.g., "DNAT foo!bar ..."). Current 1.3.11
users who don't need rules of this type need not upgrade to 1.3.11.</p>
<p><b>11/25/2002 - Shorewall 1.3.11 Documentation in PDF Format</b><b>
</b></p>
</b></p>
<p>Juraj Ontkanin has produced a PDF containing the Shorewall 1.3.11
documenation. the PDF may be downloaded from</p>
documenation. the PDF may be downloaded from</p>
<p>    <a
href="ftp://slovakia.shorewall.net/mirror/shorewall/pdf/" target="_top">ftp://slovakia.shorewall.net/mirror/shorewall/pdf/</a><br>
    <a
    <a
href="http://slovakia.shorewall.net/pub/shorewall/pdf/">http://slovakia.shorewall.net/pub/shorewall/pdf/</a><br>
</p>
</p>
<p><b>11/24/2002 - Shorewall 1.3.11</b><b> </b><b>
</b></p>
<p>In this version:</p>
<ul>
<li>A 'tcpflags' option has been added to entries
in <a href="Documentation.htm#Interfaces">/etc/shorewall/interfaces</a>.
This option causes Shorewall to make a set of sanity check on TCP packet
header flags.</li>
<li>It is now allowed to use 'all' in the SOURCE or
DEST column in a <a href="Documentation.htm#Rules">rule</a>. When
used, 'all' must appear by itself (in may not be qualified) and it does
not enable intra-zone traffic. For example, the rule <br>
<br>
    ACCEPT loc all tcp 80<br>
<br>
does not enable http traffic from 'loc' to 'loc'.</li>
<li>Shorewall's use of the 'echo' command is now compatible
with bash clones such as ash and dash.</li>
<li>fw-&gt;fw policies now generate a startup error.
fw-&gt;fw rules generate a warning and are ignored</li>
<ul>
<li>A 'tcpflags' option has been added to
entries in <a href="Documentation.htm#Interfaces">/etc/shorewall/interfaces</a>.
This option causes Shorewall to make a set of sanity check on TCP packet
header flags.</li>
<li>It is now allowed to use 'all' in the
SOURCE or DEST column in a <a href="Documentation.htm#Rules">rule</a>.
When used, 'all' must appear by itself (in may not be qualified) and
it does not enable intra-zone traffic. For example, the rule <br>
<br>
    ACCEPT loc all tcp 80<br>
<br>
does not enable http traffic from 'loc' to 'loc'.</li>
<li>Shorewall's use of the 'echo' command
is now compatible with bash clones such as ash and dash.</li>
<li>fw-&gt;fw policies now generate a startup
error. fw-&gt;fw rules generate a warning and are ignored</li>
</ul>
<p><b></b><a href="News.htm">More News</a></p>
@ -379,48 +494,53 @@ used, 'all' must appear by itself (in may not be qualified) and it does
<h2><a name="Donations"></a>Donations</h2>
</td>
</td>
<td width="88" bgcolor="#4b017c" valign="top"
<td width="88" bgcolor="#4b017c" valign="top"
align="center"> <a href="http://sourceforge.net">M</a></td>
</tr>
</tr>
</tbody>
</table>
</center>
</center>
</div>
</div>
<table border="0" cellpadding="5" cellspacing="0"
style="border-collapse: collapse;" width="100%" id="AutoNumber2"
bgcolor="#4b017c">
<tbody>
<tr>
<td width="100%" style="margin-top: 1px;">
<tbody>
<tr>
<td width="100%" style="margin-top: 1px;">
<p align="center"><a href="http://www.starlight.org"> <img
border="4" src="images/newlog.gif" width="57" height="100" align="left"
hspace="10">
 
</a></p>
 
</a></p>
@ -428,28 +548,31 @@ used, 'all' must appear by itself (in may not be qualified) and it does
<p align="center"><font size="4" color="#ffffff">Shorewall is free
but if you try it and find it useful, please consider making a donation
to <a
to <a
href="http://www.starlight.org"><font color="#ffffff">Starlight
Children's Foundation.</font></a> Thanks!</font></p>
</td>
</tr>
</td>
</tr>
</tbody>
</table>
<p><font size="2">Updated 12/27/2002 - <a href="support.htm">Tom Eastep</a></font>
<p><font size="2">Updated 1/13/2003 - <a href="support.htm">Tom Eastep</a></font>
<br>
<br>
</p>
<br>
</body>

161
Shorewall-docs/shoreline.htm
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@ -1,124 +1,125 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type"
content="text/html; charset=windows-1252">
<title>About the Shorewall Author</title>
<meta name="GENERATOR" content="Microsoft FrontPage 5.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<meta name="ProgId" content="FrontPage.Editor.Document">
<meta name="Microsoft Theme" content="none">
</head>
<body>
<table border="0" cellpadding="0" cellspacing="0"
style="border-collapse: collapse;" width="100%" id="AutoNumber1"
bgcolor="#400169" height="90">
<tbody>
<tr>
<td width="100%">
<tbody>
<tr>
<td width="100%">
<h1 align="center"><font color="#ffffff">Tom Eastep</font></h1>
</td>
</tr>
</tbody>
</td>
</tr>
</tbody>
</table>
<p align="center"> <img border="3" src="images/TomNTarry.png"
alt="Tom on the PCT - 1991" width="316" height="392">
</p>
</p>
<p align="center">Tarry &amp; Tom -- August 2002<br>
<br>
</p>
<br>
</p>
<ul>
<li>Born 1945 in <a
<li>Born 1945 in <a
href="http://www.experiencewashington.com">Washington State</a> .</li>
<li>BA Mathematics from <a href="http://www.wsu.edu">Washington
State University</a> 1967</li>
<li>MA Mathematics from <a
<li>BA Mathematics from <a href="http://www.wsu.edu">Washington
State University</a> 1967</li>
<li>MA Mathematics from <a
href="http://www.washington.edu">University of Washington</a> 1969</li>
<li>Burroughs Corporation (now <a
<li>Burroughs Corporation (now <a
href="http://www.unisys.com">Unisys</a> ) 1969 - 1980</li>
<li><a href="http://www.tandem.com">Tandem Computers, Incorporated</a>
(now part of the <a href="http://www.hp.com">The New HP</a>) 1980 -
<li><a href="http://www.tandem.com">Tandem Computers, Incorporated</a>
(now part of the <a href="http://www.hp.com">The New HP</a>) 1980 -
present</li>
<li>Married 1969 - no children.</li>
</ul>
<p>I am currently a member of the design team for the next-generation
operating system from the NonStop Enterprise Division of HP. </p>
<p>I became interested in Internet Security when I established a home office
in 1999 and had DSL service installed in our home. I investigated
ipchains and developed the scripts which are now collectively known as
<a href="http://seawall.sourceforge.net"> Seattle Firewall</a>. Expanding
on what I learned from Seattle Firewall, I then designed and wrote
Shorewall. </p>
<p>I telework from our home in <a href="http://www.cityofshoreline.com">Shoreline,
Washington</a> where I live with my wife Tarry. </p>
<p>Our current home network consists of: </p>
<li>Married 1969 - no children.</li>
<ul>
<li>1.2Gz Athlon, Windows XP Pro, 320MB RAM, 40GB &amp; 20GB
IDE HDs and LNE100TX (Tulip) NIC - My personal Windows system. Also
has <a href="http://www.mandrakelinux.com">Mandrake</a> 9.0 installed.</li>
<li>Celeron 1.4Gz, RH8.0, 384MB RAM, 60GB HD, LNE100TX(Tulip)
NIC - My personal Linux System which runs Samba configured as a WINS
server. This system also has <a href="http://www.vmware.com/">VMware</a>
installed and can run both <a href="http://www.debian.org">Debian
Woody</a> and <a href="http://www.suse.com">SuSE 8.1</a> in virtual
machines.</li>
<li>K6-2/350, RH8.0, 384MB RAM, 8GB IDE HD, EEPRO100 NIC  -
Email (Postfix &amp; Courier-IMAP), HTTP (Apache), FTP (Pure_ftpd), DNS
server (Bind).</li>
<li>PII/233, RH8.0, 256MB MB RAM, 2GB SCSI HD - 3 LNE100TX 
(Tulip) and 1 TLAN NICs  - Firewall running Shorewall 1.3.11  and a DHCP
server.  Also runs PoPToP for road warrior access.</li>
<li>Duron 750, Win ME, 192MB RAM, 20GB HD, RTL8139 NIC - My
wife's personal system.</li>
<li>PII/400 Laptop, WinXP SP1, 224MB RAM, 12GB HD, onboard
EEPRO100 and EEPRO100 in expansion base and LinkSys WAC11 - My main
work system.</li>
</ul>
<p>I am currently a member of the design team for the next-generation
operating system from the NonStop Enterprise Division of HP. </p>
<p>I became interested in Internet Security when I established a home office
in 1999 and had DSL service installed in our home. I investigated
ipchains and developed the scripts which are now collectively known as
<a href="http://seawall.sourceforge.net"> Seattle Firewall</a>. Expanding
on what I learned from Seattle Firewall, I then designed and wrote
Shorewall. </p>
<p>I telework from our home in <a href="http://www.cityofshoreline.com">Shoreline,
Washington</a> where I live with my wife Tarry. </p>
<p>Our current home network consists of: </p>
<ul>
<li>1.2Gz Athlon, Windows XP Pro, 320MB RAM, 40GB &amp; 20GB
IDE HDs and LNE100TX (Tulip) NIC - My personal Windows system.
Serves as a PPTP server for Road Warrior access. Also has <a
href="http://www.mandrakelinux.com">Mandrake</a> 9.0 installed.</li>
<li>Celeron 1.4Gz, RH8.0, 384MB RAM, 60GB HD, LNE100TX(Tulip)
NIC - My personal Linux System which runs Samba configured as a
WINS server. This system also has <a
href="http://www.vmware.com/">VMware</a> installed and can run
both <a href="http://www.debian.org">Debian Woody</a> and <a
href="http://www.suse.com">SuSE 8.1</a> in virtual machines.</li>
<li>K6-2/350, RH8.0, 384MB RAM, 8GB IDE HD, EEPRO100 NIC 
- Email (Postfix &amp; Courier-IMAP), HTTP (Apache), FTP (Pure_ftpd),
DNS server (Bind).</li>
<li>PII/233, RH8.0, 256MB MB RAM, 2GB SCSI HD - 3 LNE100TX 
(Tulip) and 1 TLAN NICs  - Firewall running Shorewall 1.3.12+  and a
DHCP server.</li>
<li>Duron 750, Win ME, 192MB RAM, 20GB HD, RTL8139 NIC - My
wife's personal system.</li>
<li>PII/400 Laptop, WinXP SP1, 224MB RAM, 12GB HD, onboard
EEPRO100 and EEPRO100 in expansion base and LinkSys WAC11 - My main
work system.</li>
</ul>
<p>For more about our network see <a href="myfiles.htm">my Shorewall Configuration</a>.</p>
<p>All of our other systems are made by <a
href="http://www.compaq.com">Compaq</a> (part of the new <a
href="http://www.hp.com/">HP</a>).. All of our Tulip NICs are <a
href="http://www.netgear.com">Netgear</a> FA310TXs.</p>
<p><a href="http://www.redhat.com"><img border="0"
src="images/poweredby.png" width="88" height="31">
</a><a href="http://www.compaq.com"><img border="0"
</a><a href="http://www.compaq.com"><img border="0"
src="images/poweredbycompaqlog0.gif" hspace="3" width="83" height="25">
</a><a href="http://www.pureftpd.org"><img border="0"
</a><a href="http://www.pureftpd.org"><img border="0"
src="images/pure.jpg" width="88" height="31">
</a><font size="4"><a href="http://www.apache.org"><img
</a><font size="4"><a href="http://www.apache.org"><img
border="0" src="images/apache_pb1.gif" hspace="2" width="170"
height="20">
</a><a href="http://www.mandrakelinux.com"><img
</a><a href="http://www.mandrakelinux.com"><img
src="images/medbutton.png" alt="Powered by Mandrake" width="90"
height="32">
</a><img src="images/shorewall.jpg" alt="Protected by Shorewall"
</a><img src="images/shorewall.jpg" alt="Protected by Shorewall"
width="125" height="40" hspace="4">
</font></p>
<p><font size="2">Last updated 12/7/2002 - </font><font size="2"> <a
</font></p>
<p><font size="2">Last updated 1/7/2003 - </font><font size="2"> <a
href="support.htm">Tom Eastep</a></font> </p>
<font face="Trebuchet MS"><a href="copyright.htm"><font
size="2">Copyright</font> © <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font><br>
<br>
<br>
<font face="Trebuchet MS"><a href="copyright.htm"><font
size="2">Copyright</font> © <font size="2">2001, 2002, 2003 Thomas
M. Eastep.</font></a></font><br>
</body>
</html>

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<html>
<head>
<title>Shorewall Logging</title>
<meta http-equiv="content-type"
content="text/html; charset=ISO-8859-1">
<meta name="author" content="Tom Eastep">
</head>
<body>
<body>
<table border="0" cellpadding="0" cellspacing="0"
style="border-collapse: collapse;" bordercolor="#111111" width="100%"
id="AutoNumber1" bgcolor="#400169" height="90">
<tbody>
<tr>
<td width="100%">
<tbody>
<tr>
<td width="100%">
<h1 align="center"><font color="#ffffff">Logging</font></h1>
</td>
</tr>
</tbody>
</td>
</tr>
</tbody>
</table>
<br>
By default, Shorewall directs NetFilter to log using syslog (8). Syslog
classifies log messages by a <i>facility</i> and a <i>priority</i> (using
the notation <i>facility.priority</i>). <br>
<br>
The facilities defined by syslog are <i>auth, authpriv, cron, daemon,
kern, lpr, mail, mark, news, syslog, user, uucp</i> and <i>local0</i> through
<i>local7</i>.<br>
<br>
Throughout the Shorewall documentation, I will use the term <i>level</i>
rather than <i>priority</i> since <i>level</i> is the term used by NetFilter.
The syslog documentation uses the term <i>priority</i>.<br>
<h3>Syslog Levels<br>
</h3>
Syslog levels are a method of describing to syslog (8) the importance
of a message and a number of Shorewall parameters have a syslog level as
their value.<br>
<br>
Valid levels are:<br>
<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
debug<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
info<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
notice<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
warning<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
err<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
crit<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
alert<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
emerg<br>
<br>
For most Shorewall logging, a level of 6 (info) is appropriate. Shorewall
log messages are generated by NetFilter and are logged using the <i>kern</i>
facility and the level that you specify. If you are unsure of the level
to choose, 6 (info) is a safe bet. You may specify levels by name or by
number.<br>
<br>
By default, Shorewall directs NetFilter to log using syslog (8). Syslog
classifies log messages by a <i>facility</i> and a <i>priority</i> (using
the notation <i>facility.priority</i>). <br>
<br>
Syslogd writes log messages to files (typically in /var/log/*) based
on their facility and level. The mapping of these facility/level pairs
The facilities defined by syslog are <i>auth, authpriv, cron, daemon,
kern, lpr, mail, mark, news, syslog, user, uucp</i> and <i>local0</i> through
<i>local7</i>.<br>
<br>
Throughout the Shorewall documentation, I will use the term <i>level</i>
rather than <i>priority</i> since <i>level</i> is the term used by NetFilter.
The syslog documentation uses the term <i>priority</i>.<br>
<h3>Syslog Levels<br>
</h3>
Syslog levels are a method of describing to syslog (8) the importance
of a message and a number of Shorewall parameters have a syslog level
as their value.<br>
<br>
Valid levels are:<br>
<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
debug<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
info<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
notice<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
warning<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
err<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
crit<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
alert<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
emerg<br>
<br>
For most Shorewall logging, a level of 6 (info) is appropriate.
Shorewall log messages are generated by NetFilter and are logged using
the <i>kern</i> facility and the level that you specify. If you are unsure
of the level to choose, 6 (info) is a safe bet. You may specify levels
by name or by number.<br>
<br>
Syslogd writes log messages to files (typically in /var/log/*) based
on their facility and level. The mapping of these facility/level pairs
to log files is done in /etc/syslog.conf (5). If you make changes to this
file, you must restart syslogd before the changes can take effect.<br>
<h3>Configuring a Separate Log for Shorewall Messages</h3>
There are a couple of limitations to syslogd-based logging:<br>
There are a couple of limitations to syslogd-based logging:<br>
<ol>
<li>If you give, for example, kern.info it's own log destination then
that destination will also receive all kernel messages of levels 5 (notice)
through 0 (emerg).</li>
<li>All kernel.info messages will go to that destination and not just
those from NetFilter.<br>
</li>
</ol>
Beginning with Shorewall version 1.3.12, if your kernel has ULOG target
support (and most vendor-supplied kernels do), you may also specify a log
level of ULOG (must be all caps). When ULOG is used, Shorewall will direct
netfilter to log the related messages via the ULOG target which will send
them to a process called 'ulogd'. The ulogd program is available from http://www.gnumonks.org/projects/ulogd
and can be configured to log all Shorewall message to their own log file.<br>
<br>
Download the ulod tar file and:<br>
<li>If you give, for example, kern.info it's own log destination then
that destination will also receive all kernel messages of levels 5 (notice)
through 0 (emerg).</li>
<li>All kernel.info messages will go to that destination and not just
those from NetFilter.<br>
</li>
</ol>
Beginning with Shorewall version 1.3.12, if your kernel has ULOG
target support (and most vendor-supplied kernels do), you may also specify
a log level of ULOG (must be all caps). When ULOG is used, Shorewall will
direct netfilter to log the related messages via the ULOG target which will
send them to a process called 'ulogd'. The ulogd program is available from
http://www.gnumonks.org/projects/ulogd and can be configured to log all
Shorewall message to their own log file.<br>
<br>
<b>Note: </b>The ULOG logging mechanism is <u>completely separate</u> from
syslog. Once you switch to ULOG, the settings in /etc/syslog.conf have absolutely
no effect on your Shorewall logging (except for Shorewall status messages
which still go to syslog).<br>
<br>
You will need to have the kernel source available to compile ulogd.<br>
<br>
Download the ulod tar file and:<br>
<ol>
<li>Be sure that /usr/src/linux is linked to your kernel source tree<br>
</li>
<li>cd /usr/local/src (or wherever you do your builds)</li>
<li>tar -zxf <i>source-tarball-that-you-downloaded</i></li>
<li>cd ulogd-<i>version</i><br>
</li>
<li>./configure</li>
<li>make</li>
<li>make install<br>
</li>
</ol>
If you are like me and don't have a development environment on your firewall,
you can do the first five steps on another system then either NFS mount
your /usr/local/src directory or tar up the /usr/local/src/ulogd-<i>version</i>
directory and move it to your firewall system.<br>
<br>
Now on the firewall system, edit /usr/local/etc/ulogd.conf and set:<br>
<li>tar -zxf <i>source-tarball-that-you-downloaded</i></li>
<li>cd ulogd-<i>version</i><br>
</li>
<li>./configure</li>
<li>make</li>
<li>make install<br>
</li>
<ol>
<li>syslogfile <i>&lt;file that you wish to log to&gt;</i></li>
<li>syslogsync 1</li>
</ol>
I also copied the file /usr/local/src/ulogd-<i>version</i>/ulogd.init to
/etc/init.d/ulogd. I had to edit the line that read "daemon /usr/local/sbin/ulogd"
to read daemon /usr/local/sbin/ulogd -d". On a RedHat system, a simple "chkconfig
--level 3 ulogd on" starts ulogd during boot up. Your init system may need
something else done to activate the script.<br>
<br>
Finally edit /etc/shorewall/shorewall.conf and set LOGFILE=<i>&lt;file
that you wish to log to&gt;</i>. This tells the /sbin/shorewall program
If you are like me and don't have a development environment on your firewall,
you can do the first six steps on another system then either NFS mount
your /usr/local/src directory or tar up the /usr/local/src/ulogd-<i>version</i>
directory and move it to your firewall system.<br>
<br>
Now on the firewall system, edit /usr/local/etc/ulogd.conf and set:<br>
<ol>
<li>syslogfile <i>&lt;file that you wish to log to&gt;</i></li>
<li>syslogsync 1</li>
</ol>
I also copied the file /usr/local/src/ulogd-<i>version</i>/ulogd.init
to /etc/init.d/ulogd. I had to edit the line that read "daemon /usr/local/sbin/ulogd"
to read daemon /usr/local/sbin/ulogd -d". On a RedHat system, a simple
"chkconfig --level 3 ulogd on" starts ulogd during boot up. Your init system
may need something else done to activate the script.<br>
<br>
You will need to change all instances of log levels (usually 'info') in
your configuration files to 'ULOG' - this includes entries in the policy,
rules and shorewall.conf files. Here's what I have:<br>
<pre> [root@gateway shorewall]# grep ULOG *<br> policy:loc&nbsp; fw&nbsp;&nbsp; REJECT&nbsp; ULOG<br> policy:net&nbsp; all&nbsp; DROP&nbsp;&nbsp;&nbsp; ULOG&nbsp;&nbsp;&nbsp;10/sec:40<br> policy:all&nbsp; all&nbsp; REJECT&nbsp; ULOG<br> rules:REJECT:ULOG loc net tcp 6667<br> shorewall.conf:TCP_FLAGS_LOG_LEVEL=ULOG<br> shorewall.conf:RFC1918_LOG_LEVEL=ULOG<br> [root@gateway shorewall]#<br></pre>
Finally edit /etc/shorewall/shorewall.conf and set LOGFILE=<i>&lt;file
that you wish to log to&gt;</i>. This tells the /sbin/shorewall program
where to look for the log when processing its "show log", "logwatch" and
"monitor" commands.<br>
<p><font size="2"> Updated 12/29/2002 - <a
href="file:///home/teastep/Shorewall-docs/support.htm">Tom Eastep</a>
</font></p>
<p><font size="2"> Updated 1/11/2003 - <a href="support.htm">Tom Eastep</a>
</font></p>
<p><font face="Trebuchet MS"><a href="copyright.htm"><font size="2">Copyright</font>
&copy; <font size="2">2001, 2002 Thomas M. Eastep</font></a></font><br>
</p>
<h2><br>
</h2>
<p><a href="copyright.htm"><font size="2">Copyright</font> &copy;
<font size="2">2001, 2002, 2003 Thomas M. Eastep</font></a><br>
</p>
</body>
</html>

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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Language" content="en-us">
<meta name="GENERATOR" content="Microsoft FrontPage 5.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<meta http-equiv="Content-Type"
content="text/html; charset=windows-1252">
<title>Shorewall QuickStart Guide</title>
<meta name="Microsoft Theme" content="none">
</head>
<body>
<table border="0" cellpadding="0" cellspacing="0"
style="border-collapse: collapse;" width="100%" id="AutoNumber1"
bgcolor="#400169" height="90">
<tbody>
<tr>
<td width="100%">
<h1 align="center"><font color="#ffffff">Shorewall QuickStart Guides<br>
Version 3.1</font></h1>
</td>
</tr>
</tbody>
<tbody>
<tr>
<td width="100%">
<h1 align="center"><font color="#ffffff">Shorewall QuickStart Guides
(HOWTO's)<br>
Version 3.1</font></h1>
</td>
</tr>
</tbody>
</table>
<p align="center">With thanks to Richard who reminded me once again that we
must all first walk before we can run.</p>
<h2>The Guides</h2>
<p>These guides provide step-by-step instructions for configuring Shorewall
in common firewall setups.</p>
in common firewall setups.</p>
<p>The following guides are for <b>users who have a single public IP address</b>:</p>
<ul>
<li><a href="standalone.htm">Standalone</a> Linux System</li>
<li><a href="two-interface.htm">Two-interface</a> Linux System
acting as a firewall/router for a small local network</li>
<li><a href="three-interface.htm">Three-interface</a> Linux
System acting as a firewall/router for a small local network and a
DMZ.</li>
<li><a href="standalone.htm">Standalone</a> Linux System</li>
<li><a href="two-interface.htm">Two-interface</a> Linux
System acting as a firewall/router for a small local network</li>
<li><a href="three-interface.htm">Three-interface</a> Linux
System acting as a firewall/router for a small local network and
a DMZ.</li>
</ul>
<p>The above guides are designed to get your first firewall up and running
quickly in the three most common Shorewall configurations.</p>
quickly in the three most common Shorewall configurations.</p>
<p>The <a href="shorewall_setup_guide.htm">Shorewall Setup Guide</a> outlines
the steps necessary to set up a firewall where <b>there are multiple
public IP addresses involved or if you want to learn more about Shorewall
than is explained in the single-address guides above.</b></p>
the steps necessary to set up a firewall where <b>there are multiple
public IP addresses involved or if you want to learn more about Shorewall
than is explained in the single-address guides above.</b></p>
<ul>
<li><a href="shorewall_setup_guide.htm#Introduction">1.0
Introduction</a></li>
<li><a href="shorewall_setup_guide.htm#Concepts">2.0 Shorewall
Concepts</a></li>
<li><a href="shorewall_setup_guide.htm#Interfaces">3.0 Network
Interfaces</a></li>
<li><a href="shorewall_setup_guide.htm#Addressing">4.0 Addressing,
Subnets and Routing</a>
<li><a href="shorewall_setup_guide.htm#Introduction">1.0
Introduction</a></li>
<li><a href="shorewall_setup_guide.htm#Concepts">2.0 Shorewall
Concepts</a></li>
<li><a href="shorewall_setup_guide.htm#Interfaces">3.0
Network Interfaces</a></li>
<li><a href="shorewall_setup_guide.htm#Addressing">4.0
Addressing, Subnets and Routing</a>
<ul>
<li><a href="shorewall_setup_guide.htm#Addresses">4.1 IP
Addresses</a></li>
<li><a
<li><a href="shorewall_setup_guide.htm#Addresses">4.1
IP Addresses</a></li>
<li><a
href="shorewall_setup_guide.htm#Subnets">4.2 Subnets</a></li>
<li><a href="shorewall_setup_guide.htm#Routing">4.3 Routing</a></li>
<li><a href="shorewall_setup_guide.htm#ARP">4.4 Address
Resolution Protocol</a></li>
<li><a href="shorewall_setup_guide.htm#Routing">4.3 Routing</a></li>
<li><a href="shorewall_setup_guide.htm#ARP">4.4 Address
Resolution Protocol</a></li>
</ul>
<ul>
<li><a href="shorewall_setup_guide.htm#RFC1918">4.5 RFC
1918</a></li>
<li><a href="shorewall_setup_guide.htm#RFC1918">4.5 RFC
1918</a></li>
</ul>
</li>
<li><a href="shorewall_setup_guide.htm#Options">5.0 Setting
up your Network</a>
<ul>
<li><a href="shorewall_setup_guide.htm#Routed">5.1 Routed</a></li>
</ul>
<ul>
<li><a href="shorewall_setup_guide.htm#NonRouted">5.2 Non-routed</a>
<ul>
<li><a href="shorewall_setup_guide.htm#SNAT">5.2.1 SNAT</a></li>
<li><a href="shorewall_setup_guide.htm#DNAT">5.2.2 DNAT</a></li>
<li><a href="shorewall_setup_guide.htm#ProxyARP">5.2.3
Proxy ARP</a></li>
<li><a href="shorewall_setup_guide.htm#NAT">5.2.4 Static
NAT</a></li>
</ul>
</li>
<li><a href="shorewall_setup_guide.htm#Rules">5.3 Rules</a></li>
<li><a href="shorewall_setup_guide.htm#OddsAndEnds">5.4
Odds and Ends</a></li>
</ul>
</li>
<li><a href="shorewall_setup_guide.htm#DNS">6.0 DNS</a></li>
<li><a
href="shorewall_setup_guide.htm#StartingAndStopping">7.0 Starting and
Stopping the Firewall</a></li>
</ul>
<h2><a name="Documentation"></a>Documentation Index</h2>
<p>The following documentation covers a variety of topics and <b>supplements
the <a href="shorewall_quickstart_guide.htm">QuickStart Guides</a>
described above</b>. Please review the appropriate guide before trying
to use this documentation directly.</p>
<ul>
<li><a href="blacklisting_support.htm">Blacklisting</a>
<li><a href="shorewall_setup_guide.htm#Options">5.0 Setting
up your Network</a>
<ul>
<li>Static Blacklisting using /etc/shorewall/blacklist</li>
<li>Dynamic Blacklisting using /sbin/shorewall</li>
<li><a href="shorewall_setup_guide.htm#Routed">5.1 Routed</a></li>
</ul>
</li>
<li><a href="configuration_file_basics.htm">Common configuration
file features</a>
<ul>
<li><a href="configuration_file_basics.htm#Comments">Comments
in configuration files</a></li>
<li><a href="shorewall_setup_guide.htm#NonRouted">5.2
Non-routed</a>
<ul>
<li><a href="shorewall_setup_guide.htm#SNAT">5.2.1
SNAT</a></li>
<li><a href="shorewall_setup_guide.htm#DNAT">5.2.2
DNAT</a></li>
<li><a href="shorewall_setup_guide.htm#ProxyARP">5.2.3
Proxy ARP</a></li>
<li><a href="shorewall_setup_guide.htm#NAT">5.2.4 Static
NAT</a></li>
</ul>
</li>
<li><a href="shorewall_setup_guide.htm#Rules">5.3 Rules</a></li>
<li><a href="shorewall_setup_guide.htm#OddsAndEnds">5.4
Odds and Ends</a></li>
</ul>
</li>
<li><a href="shorewall_setup_guide.htm#DNS">6.0 DNS</a></li>
<li><a
href="configuration_file_basics.htm#Continuation">Line Continuation</a></li>
<li><a href="configuration_file_basics.htm#Ports">Port
Numbers/Service Names</a></li>
<li><a href="configuration_file_basics.htm#Ranges">Port
Ranges</a></li>
<li><a href="configuration_file_basics.htm#Variables">Using
Shell Variables</a></li>
<li><a href="configuration_file_basics.htm#dnsnames">Using
DNS Names</a><br>
</li>
<li><a href="configuration_file_basics.htm#Compliment">Complementing
an IP address or Subnet</a></li>
<li><a href="configuration_file_basics.htm#Configs">Shorewall
Configurations (making a test configuration)</a></li>
<li><a href="configuration_file_basics.htm#MAC">Using MAC
Addresses in Shorewall</a></li>
href="shorewall_setup_guide.htm#StartingAndStopping">7.0 Starting and
Stopping the Firewall</a></li>
</ul>
<h2><a name="Documentation"></a>Documentation Index</h2>
<p>The following documentation covers a variety of topics and <b>supplements
the <a href="shorewall_quickstart_guide.htm">QuickStart Guides</a>
described above</b>. Please review the appropriate guide before trying
to use this documentation directly.</p>
<ul>
<li><a href="blacklisting_support.htm">Blacklisting</a>
</ul>
</li>
<li><a href="Documentation.htm">Configuration File Reference
Manual</a>
<ul>
<li> <a href="Documentation.htm#Variables">params</a></li>
<li><font color="#000099"><a
href="Documentation.htm#Zones">zones</a></font></li>
<li><font color="#000099"><a
href="Documentation.htm#Interfaces">interfaces</a></font></li>
<li><font color="#000099"><a
href="Documentation.htm#Hosts">hosts</a></font></li>
<li><font color="#000099"><a
href="Documentation.htm#Policy">policy</a></font></li>
<li><font color="#000099"><a
href="Documentation.htm#Rules">rules</a></font></li>
<li><a href="Documentation.htm#Common">common</a></li>
<li><font color="#000099"><a
href="Documentation.htm#Masq">masq</a></font></li>
<li><font color="#000099"><a
href="Documentation.htm#ProxyArp">proxyarp</a></font></li>
<li><font color="#000099"><a
href="Documentation.htm#NAT">nat</a></font></li>
<li><font color="#000099"><a
href="Documentation.htm#Tunnels">tunnels</a></font></li>
<li><a href="traffic_shaping.htm#tcrules">tcrules</a></li>
<li><font color="#000099"><a
href="Documentation.htm#Conf">shorewall.conf</a></font></li>
<li><a href="Documentation.htm#modules">modules</a></li>
<li><a href="Documentation.htm#TOS">tos</a> </li>
<li><a href="Documentation.htm#Blacklist">blacklist</a></li>
<li><a href="Documentation.htm#rfc1918">rfc1918</a></li>
<li><a href="Documentation.htm#Routestopped">routestopped</a></li>
<li>Static Blacklisting using /etc/shorewall/blacklist</li>
<li>Dynamic Blacklisting using /sbin/shorewall</li>
</ul>
</li>
<li><a href="dhcp.htm">DHCP</a></li>
<li><font color="#000099"><a
</li>
<li><a href="configuration_file_basics.htm">Common configuration
file features</a>
<ul>
<li><a href="configuration_file_basics.htm#Comments">Comments
in configuration files</a></li>
<li><a
href="configuration_file_basics.htm#Continuation">Line Continuation</a></li>
<li><a href="configuration_file_basics.htm#Ports">Port
Numbers/Service Names</a></li>
<li><a href="configuration_file_basics.htm#Ranges">Port
Ranges</a></li>
<li><a
href="configuration_file_basics.htm#Variables">Using Shell Variables</a></li>
<li><a href="configuration_file_basics.htm#dnsnames">Using
DNS Names</a><br>
</li>
<li><a
href="configuration_file_basics.htm#Compliment">Complementing an IP address
or Subnet</a></li>
<li><a href="configuration_file_basics.htm#Configs">Shorewall
Configurations (making a test configuration)</a></li>
<li><a href="configuration_file_basics.htm#MAC">Using
MAC Addresses in Shorewall</a></li>
</ul>
</li>
<li><a href="Documentation.htm">Configuration File Reference
Manual</a>
<ul>
<li> <a href="Documentation.htm#Variables">params</a></li>
<li><font color="#000099"><a
href="Documentation.htm#Zones">zones</a></font></li>
<li><font color="#000099"><a
href="Documentation.htm#Interfaces">interfaces</a></font></li>
<li><font color="#000099"><a
href="Documentation.htm#Hosts">hosts</a></font></li>
<li><font color="#000099"><a
href="Documentation.htm#Policy">policy</a></font></li>
<li><font color="#000099"><a
href="Documentation.htm#Rules">rules</a></font></li>
<li><a href="Documentation.htm#Common">common</a></li>
<li><font color="#000099"><a
href="Documentation.htm#Masq">masq</a></font></li>
<li><font color="#000099"><a
href="Documentation.htm#ProxyArp">proxyarp</a></font></li>
<li><font color="#000099"><a
href="Documentation.htm#NAT">nat</a></font></li>
<li><font color="#000099"><a
href="Documentation.htm#Tunnels">tunnels</a></font></li>
<li><a href="traffic_shaping.htm#tcrules">tcrules</a></li>
<li><font color="#000099"><a
href="Documentation.htm#Conf">shorewall.conf</a></font></li>
<li><a href="Documentation.htm#modules">modules</a></li>
<li><a href="Documentation.htm#TOS">tos</a> </li>
<li><a href="Documentation.htm#Blacklist">blacklist</a></li>
<li><a href="Documentation.htm#rfc1918">rfc1918</a></li>
<li><a href="Documentation.htm#Routestopped">routestopped</a></li>
</ul>
</li>
<li><a href="dhcp.htm">DHCP</a></li>
<li><font color="#000099"><a
href="shorewall_extension_scripts.htm">Extension Scripts</a></font>
(How to extend Shorewall without modifying Shorewall code)</li>
<li><a href="fallback.htm">Fallback/Uninstall</a></li>
<li><a href="shorewall_firewall_structure.htm">Firewall Structure</a></li>
<li><font color="#000099"><a href="kernel.htm">Kernel Configuration</a></font></li>
<li><a href="shorewall_logging.html">Logging</a><br>
</li>
<li><a href="MAC_Validation.html">MAC Verification</a><br>
</li>
<li><a href="myfiles.htm">My Configuration Files</a> (How I personally
use Shorewall)</li>
<li><a href="ping.html">'Ping' Management</a><br>
<li><a href="fallback.htm">Fallback/Uninstall</a></li>
<li><a href="shorewall_firewall_structure.htm">Firewall
Structure</a></li>
<li><font color="#000099"><a href="kernel.htm">Kernel Configuration</a></font></li>
<li><a href="shorewall_logging.html">Logging</a><br>
</li>
<li><a href="MAC_Validation.html">MAC Verification</a><br>
</li>
<li><a href="ports.htm">Port Information</a>
<li><a href="myfiles.htm">My Configuration Files</a> (How I personally
use Shorewall)</li>
<li><a href="ping.html">'Ping' Management</a><br>
</li>
<li><a href="ports.htm">Port Information</a>
<ul>
<li>Which applications use which ports</li>
<li>Ports used by Trojans</li>
<li>Which applications use which ports</li>
<li>Ports used by Trojans</li>
</ul>
</li>
<li><a href="ProxyARP.htm">Proxy ARP</a></li>
<li><a href="samba.htm">Samba</a></li>
<li><font color="#000099"><a
</li>
<li><a href="ProxyARP.htm">Proxy ARP</a></li>
<li><a href="samba.htm">Samba</a></li>
<li><font color="#000099"><a
href="starting_and_stopping_shorewall.htm">Starting/stopping the Firewall</a></font></li>
<ul>
<li>Description of all /sbin/shorewall commands</li>
<li>How to safely test a Shorewall configuration change<br>
</li>
<li>Description of all /sbin/shorewall commands</li>
<li>How to safely test a Shorewall configuration change<br>
</li>
</ul>
<li><font color="#000099"><a href="NAT.htm">Static NAT</a></font></li>
<li><a href="traffic_shaping.htm">Traffic Shaping/Control</a></li>
<li>VPN
<li><font color="#000099"><a href="NAT.htm">Static NAT</a></font></li>
<li><a href="Shorewall_Squid_Usage.html">Squid as a Transparent Proxy with
Shorewall</a><br>
</li>
<li><a href="traffic_shaping.htm">Traffic Shaping/QOS</a></li>
<li>VPN
<ul>
<li><a href="IPSEC.htm">IPSEC</a></li>
<li><a href="IPIP.htm">GRE and IPIP</a></li>
<li><a href="PPTP.htm">PPTP</a></li>
<li><a href="VPN.htm">IPSEC/PPTP</a> from a system behind
your firewall to a remote network.</li>
<li><a href="IPSEC.htm">IPSEC</a></li>
<li><a href="IPIP.htm">GRE and IPIP</a></li>
<li><a href="PPTP.htm">PPTP</a></li>
<li><a href="VPN.htm">IPSEC/PPTP</a> from a system behind
your firewall to a remote network.</li>
</ul>
</li>
<li><a href="whitelisting_under_shorewall.htm">White List
Creation</a></li>
</li>
<li><a href="whitelisting_under_shorewall.htm">White List
Creation</a></li>
</ul>
<p>If you use one of these guides and have a suggestion for improvement <a
href="mailto:webmaster@shorewall.net">please let me know</a>.</p>
<p><font size="2">Last modified 12/29/2002 - <a href="support.htm">Tom Eastep</a></font></p>
<p><a href="copyright.htm"><font size="2">Copyright 2002 Thomas M. Eastep</font></a><br>
</p>
<p><font size="2">Last modified 1/9/2003 - <a href="support.htm">Tom Eastep</a></font></p>
<p><a href="copyright.htm"><font size="2">Copyright 2002, 2003 Thomas M.
Eastep</font></a><br>
</p>
<br>
<br>
</body>
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@ -5,7 +5,7 @@
<meta http-equiv="Content-Type"
content="text/html; charset=windows-1252">
<title>Shoreline Firewall (Shorewall) 1.3</title>
@ -13,21 +13,22 @@
<base target="_self">
<base
target="_self">
</head>
<body>
<table border="0" cellpadding="0" cellspacing="4"
style="border-collapse: collapse;" width="100%" id="AutoNumber3"
bgcolor="#4b017c">
<tbody>
<tbody>
<tr>
<tr>
<td width="100%" height="90">
<td width="100%" height="90">
@ -35,15 +36,15 @@
<h1 align="center"> <font size="4"><i> <a
href="http://www.cityofshoreline.com"> <img vspace="4" hspace="4"
alt="Shorwall Logo" height="70" width="85" align="left"
src="images/washington.jpg" border="0">
</a></i></font><font color="#ffffff">Shorewall 1.3
- <font size="4">"<i>iptables made easy"</i></font></font><a
href="http://www.sf.net"> </a></h1>
</a></i></font><font color="#ffffff">Shorewall
1.3 - <font size="4">"<i>iptables made
easy"</i></font></font><a href="http://www.sf.net"> </a></h1>
@ -51,32 +52,33 @@
<div align="center"><a href="/1.2/index.html" target="_top"><font
color="#ffffff">Shorewall 1.2 Site here</font></a></div>
</td>
</tr>
</td>
</tr>
</tbody>
</tbody>
</table>
<div align="center">
<center>
<div align="center">
<center>
<table border="0" cellpadding="0" cellspacing="0"
style="border-collapse: collapse;" width="100%" id="AutoNumber4">
<tbody>
<tbody>
<tr>
<tr>
<td width="90%">
<td width="90%">
@ -84,7 +86,8 @@
<h2 align="left">What is it?</h2>
@ -95,11 +98,11 @@
<p>The Shoreline Firewall, more commonly known as "Shorewall", is a
<a href="http://www.netfilter.org">Netfilter</a> (iptables) based firewall
that can be used on a dedicated firewall system, a multi-function
gateway/router/server or on a standalone GNU/Linux system.</p>
<p>The Shoreline Firewall, more commonly known as "Shorewall", is
a <a href="http://www.netfilter.org">Netfilter</a> (iptables) based
firewall that can be used on a dedicated firewall system, a multi-function
gateway/router/server or on a standalone GNU/Linux system.</p>
@ -109,26 +112,26 @@
<p>This program is free software; you can redistribute it and/or modify
it under the terms of <a
href="http://www.gnu.org/licenses/gpl.html">Version 2 of the GNU General
Public License</a> as published by the Free Software Foundation.<br>
<p>This program is free software; you can redistribute it and/or modify
it under the terms of <a
href="http://www.gnu.org/licenses/gpl.html">Version 2 of the GNU
General Public License</a> as published by the Free Software Foundation.<br>
<br>
<br>
This program is distributed in the hope
that it will be useful, but WITHOUT ANY WARRANTY;
without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.<br>
This program is distributed in the
hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.<br>
<br>
<br>
You should have received a copy of the GNU
General Public License along with this program;
if not, write to the Free Software Foundation,
Inc., 675 Mass Ave, Cambridge, MA 02139, USA</p>
You should have received a copy of the
GNU General Public License along with this
program; if not, write to the Free Software Foundation,
Inc., 675 Mass Ave, Cambridge, MA 02139, USA</p>
@ -138,8 +141,8 @@ GNU General Public License for more details.<br>
<p><a href="copyright.htm">Copyright 2001, 2002 Thomas M. Eastep</a></p>
<p><a href="copyright.htm">Copyright 2001, 2002, 2003 Thomas M. Eastep</a></p>
@ -149,21 +152,22 @@ GNU General Public License for more details.<br>
<p> <a href="http://leaf.sourceforge.net" target="_top"><img
border="0" src="images/leaflogo.gif" width="49" height="36">
</a>Jacques Nilo and Eric Wolzak have
a LEAF (router/firewall/gateway on a floppy, CD or compact
flash) distribution called <i>Bering</i> that
features Shorewall-1.3.10 and Kernel-2.4.18. You
can find their work at: <a
</a>Jacques Nilo and Eric Wolzak
have a LEAF (router/firewall/gateway on a floppy, CD
or compact flash) distribution called <i>Bering</i>
that features Shorewall-1.3.10 and Kernel-2.4.18.
You can find their work at: <a
href="http://leaf.sourceforge.net/devel/jnilo"> http://leaf.sourceforge.net/devel/jnilo</a></p>
<b>Congratulations to Jacques and Eric on the recent
release of Bering 1.0 Final!!! <br>
</b>
<b>Congratulations to Jacques and Eric on
the recent release of Bering 1.0 Final!!! <br>
</b>
<h2>News</h2>
@ -176,222 +180,319 @@ GNU General Public License for more details.<br>
<p><b>12/27/2002 - Shorewall 1.3.12 Released</b><b> </b><b><img
border="0" src="images/new10.gif" width="28" height="12" alt="(New)">
</b></p>
<p><b>1/13/2003 - Shorewall 1.3.13</b><b> </b><b><img border="0"
src="images/new10.gif" width="28" height="12" alt="(New)">
</b><br>
</p>
<p>Just includes a few things that I had on the burner:<br>
</p>
<ol>
<li>A new 'DNAT-' action has been added for entries in the /etc/shorewall/rules
file. DNAT- is intended for advanced users who wish to minimize the number
of rules that connection requests must traverse.<br>
<br>
A Shorewall DNAT rule actually generates two iptables rules: a header rewriting
rule in the 'nat' table and an ACCEPT rule in the 'filter' table. A DNAT-
rule only generates the first of these rules. This is handy when you have
several DNAT rules that would generate the same ACCEPT rule.<br>
<br>
   Here are three rules from my previous rules file:<br>
<br>
        DNAT   net  dmz:206.124.146.177 tcp smtp - 206.124.146.178<br>
        DNAT   net  dmz:206.124.146.177 tcp smtp - 206.124.146.179<br>
        ACCEPT net  dmz:206.124.146.177 tcp www,smtp,ftp,...<br>
<br>
   These three rules ended up generating _three_ copies of<br>
<br>
         ACCEPT net  dmz:206.124.146.177 tcp smtp<br>
<br>
   By writing the rules this way, I end up with only one copy of the ACCEPT
rule.<br>
<br>
        DNAT-  net  dmz:206.124.146.177 tcp smtp -  206.124.146.178<br>
        DNAT-  net  dmz:206.124.146.177 tcp smtp -  206.124.146.179<br>
        ACCEPT net  dmz:206.124.146.177 tcp www,smtp,ftp,....<br>
<br>
</li>
<li>The 'shorewall check' command now prints out the applicable policy
between each pair of zones.<br>
<br>
</li>
<li>A new CLEAR_TC option has been added to shorewall.conf. If this
option is set to 'No' then Shorewall won't clear the current traffic control
rules during [re]start. This setting is intended for use by people that prefer
to configure traffic shaping when the network interfaces come up rather than
when the firewall is started. If that is what you want to do, set TC_ENABLED=Yes
and CLEAR_TC=No and do not supply an /etc/shorewall/tcstart file. That way,
your traffic shaping rules can still use the 'fwmark' classifier based on
packet marking defined in /etc/shorewall/tcrules.<br>
<br>
</li>
<li>A new SHARED_DIR variable has been added that allows distribution
packagers to easily move the shared directory (default /usr/lib/shorewall).
Users should never have a need to change the value of this shorewall.conf
setting.</li>
</ol>
<p><b>1/6/2003 - </b><b><big><big><big><big><big><big><big><big>B</big></big></big></big></big><small>U<small>R<small>N<small>O<small>U<small>T</small></small></small></small></small></small></big></big></big></b><b>
</b></p>
<p><b>Until further notice, I will not be involved in either Shorewall
Development or Shorewall Support</b></p>
<p><b>-Tom Eastep</b><br>
</p>
<p><b>12/30/2002 - Shorewall Documentation in PDF Format</b><b>
</b></p>
<p>Juraj Ontkanin has produced a PDF containing the Shorewall 1.3.12
documenation. the PDF may be downloaded from</p>
<p>    <a
href="ftp://slovakia.shorewall.net/mirror/shorewall/pdf/"
target="_self">ftp://slovakia.shorewall.net/mirror/shorewall/pdf/</a><br>
    <a
href="http://slovakia.shorewall.net/pub/shorewall/pdf/">http://slovakia.shorewall.net/pub/shorewall/pdf/</a><br>
</p>
<p><b>12/27/2002 - Shorewall 1.3.12 Released</b><b>
</b></p>
<p> Features include:<br>
</p>
</p>
<ol>
<li>"shorewall refresh" now reloads the traffic shaping rules (tcrules
and tcstart).</li>
<li>"shorewall debug [re]start" now turns off debugging after an
error occurs. This places the point of the failure near the end of the trace
rather than up in the middle of it.</li>
<li>"shorewall [re]start" has been speeded up by more than 40% with
my configuration. Your milage may vary.</li>
<li>A "shorewall show classifiers" command has been added which
shows the current packet classification filters. The output from this command
is also added as a separate page in "shorewall monitor"</li>
<li>ULOG (must be all caps) is now accepted as a valid syslog level
and causes the subject packets to be logged using the ULOG target rather
than the LOG target. This allows you to run ulogd (available from <a
href="http://www.gnumonks.org/projects/ulogd">http://www.gnumonks.org/projects/ulogd</a>)
and log all Shorewall messages <a
href="shorewall_logging.html">to a separate log file</a>.</li>
<li>If you are running a kernel that has a FORWARD chain in the
mangle table ("shorewall show mangle" will show you the chains in the
mangle table), you can set MARK_IN_FORWARD_CHAIN=Yes in <a
href="Documentation.htm#Conf">shorewall.conf</a>. This allows for marking
input packets based on their destination even when you are using Masquerading
or SNAT.</li>
<li>I have cluttered up the /etc/shorewall directory with empty
'init', 'start', 'stop' and 'stopped' files. If you already have a file
with one of these names, don't worry -- the upgrade process won't overwrite
your file.</li>
<li>I have added a new RFC1918_LOG_LEVEL variable to <a
href="Documentation.htm#Conf">shorewall.conf</a>. This variable specifies
the syslog level at which packets are logged as a result of entries in the
/etc/shorewall/rfc1918 file. Previously, these packets were always logged
at the 'info' level.</li>
<li>"shorewall refresh" now reloads the traffic shaping rules
(tcrules and tcstart).</li>
<li>"shorewall debug [re]start" now turns off debugging after
an error occurs. This places the point of the failure near the end of
the trace rather than up in the middle of it.</li>
<li>"shorewall [re]start" has been speeded up by more than
40% with my configuration. Your milage may vary.</li>
<li>A "shorewall show classifiers" command has been added
which shows the current packet classification filters. The output from
this command is also added as a separate page in "shorewall monitor"</li>
<li>ULOG (must be all caps) is now accepted as a valid syslog
level and causes the subject packets to be logged using the ULOG target
rather than the LOG target. This allows you to run ulogd (available from
<a href="http://www.gnumonks.org/projects/ulogd">http://www.gnumonks.org/projects/ulogd</a>)
and log all Shorewall messages <a href="shorewall_logging.html">to a
separate log file</a>.</li>
<li>If you are running a kernel that has a FORWARD chain
in the mangle table ("shorewall show mangle" will show you the chains
in the mangle table), you can set MARK_IN_FORWARD_CHAIN=Yes in <a
href="Documentation.htm#Conf">shorewall.conf</a>. This allows for marking
input packets based on their destination even when you are using Masquerading
or SNAT.</li>
<li>I have cluttered up the /etc/shorewall directory with
empty 'init', 'start', 'stop' and 'stopped' files. If you already have
a file with one of these names, don't worry -- the upgrade process won't
overwrite your file.</li>
<li>I have added a new RFC1918_LOG_LEVEL variable to <a
href="Documentation.htm#Conf">shorewall.conf</a>. This variable specifies
the syslog level at which packets are logged as a result of entries in
the /etc/shorewall/rfc1918 file. Previously, these packets were always
logged at the 'info' level.</li>
</ol>
<p><b>12/20/2002 - Shorewall 1.3.12 Beta 3</b><br>
</p>
This version corrects a problem with Blacklist logging. In Beta 2, if
BLACKLIST_LOG_LEVEL was set to anything but ULOG, the firewall would fail
to start and "shorewall refresh" would also fail.<br>
</p>
This version corrects a problem with Blacklist logging. In Beta
2, if BLACKLIST_LOG_LEVEL was set to anything but ULOG, the firewall would
fail to start and "shorewall refresh" would also fail.<br>
<p> You may download the Beta from:<br>
</p>
</p>
<blockquote><a href="http://www.shorewall.net/pub/shorewall/Beta">http://www.shorewall.net/pub/shorewall/Beta</a><br>
<a href="ftp://ftp.shorewall.net/pub/shorewall/Beta"
<a href="ftp://ftp.shorewall.net/pub/shorewall/Beta"
target="_top">ftp://ftp.shorewall.net/pub/shorewall/Beta</a><br>
</blockquote>
<p><b>12/20/2002 - Shorewall 1.3.12 Beta 2</b><b>
</b></p>
The first public Beta version of Shorewall 1.3.12 is now available
(Beta 1 was made available only to a limited audience). <br>
<br>
Features include:<br>
<br>
</blockquote>
<p><b>12/20/2002 - Shorewall 1.3.12 Beta 2</b><b>
</b></p>
The first public Beta version of Shorewall 1.3.12 is now available
(Beta 1 was made available only to a limited audience). <br>
<br>
Features include:<br>
<br>
<ol>
<li>"shorewall refresh" now reloads the traffic shaping rules
(tcrules and tcstart).</li>
<li>"shorewall debug [re]start" now turns off debugging after
an error occurs. This places the point of the failure near the end of the
trace rather than up in the middle of it.</li>
<li>"shorewall [re]start" has been speeded up by more than
40% with my configuration. Your milage may vary.</li>
<li>A "shorewall show classifiers" command has been added which
shows the current packet classification filters. The output from this command
is also added as a separate page in "shorewall monitor"</li>
<li>ULOG (must be all caps) is now accepted as a valid syslog
level and causes the subject packets to be logged using the ULOG target
rather than the LOG target. This allows you to run ulogd (available from
<a href="http://www.gnumonks.org/projects/ulogd">http://www.gnumonks.org/projects/ulogd</a>)
and log all Shorewall messages <a
href="shorewall_logging.html">to a separate log file</a>.</li>
<li>If you are running a kernel that has a FORWARD chain in
the mangle table ("shorewall show mangle" will show you the chains in the
mangle table), you can set MARK_IN_FORWARD_CHAIN=Yes in shorewall.conf.
This allows for marking input packets based on their destination even when
you are using Masquerading or SNAT.</li>
<li>I have cluttered up the /etc/shorewall directory with empty
'init', 'start', 'stop' and 'stopped' files. If you already have a file
with one of these names, don't worry -- the upgrade process won't overwrite
your file.</li>
<li>"shorewall refresh" now reloads the traffic shaping
rules (tcrules and tcstart).</li>
<li>"shorewall debug [re]start" now turns off debugging
after an error occurs. This places the point of the failure near the
end of the trace rather than up in the middle of it.</li>
<li>"shorewall [re]start" has been speeded up by more
than 40% with my configuration. Your milage may vary.</li>
<li>A "shorewall show classifiers" command has been
added which shows the current packet classification filters. The output
from this command is also added as a separate page in "shorewall monitor"</li>
<li>ULOG (must be all caps) is now accepted as a valid
syslog level and causes the subject packets to be logged using the ULOG
target rather than the LOG target. This allows you to run ulogd (available
from <a href="http://www.gnumonks.org/projects/ulogd">http://www.gnumonks.org/projects/ulogd</a>)
and log all Shorewall messages <a href="shorewall_logging.html">to a
separate log file</a>.</li>
<li>If you are running a kernel that has a FORWARD chain
in the mangle table ("shorewall show mangle" will show you the chains
in the mangle table), you can set MARK_IN_FORWARD_CHAIN=Yes in shorewall.conf.
This allows for marking input packets based on their destination even
when you are using Masquerading or SNAT.</li>
<li>I have cluttered up the /etc/shorewall directory
with empty 'init', 'start', 'stop' and 'stopped' files. If you already
have a file with one of these names, don't worry -- the upgrade process
won't overwrite your file.</li>
</ol>
You may download the Beta from:<br>
You may download the Beta from:<br>
<blockquote><a href="http://www.shorewall.net/pub/shorewall/Beta">http://www.shorewall.net/pub/shorewall/Beta</a><br>
<a href="ftp://ftp.shorewall.net/pub/shorewall/Beta"
<a href="ftp://ftp.shorewall.net/pub/shorewall/Beta"
target="_top">ftp://ftp.shorewall.net/pub/shorewall/Beta</a><br>
</blockquote>
</blockquote>
<p><b>12/12/2002 - Mandrake Multi Network Firewall <a
href="http://www.mandrakesoft.com"><img src="images/logo2.png"
alt="Powered by Mandrake Linux" width="150" height="23" border="0">
</a></b></p>
Shorewall is at the center of MandrakeSofts's recently-announced
<a
href="http://www.mandrakestore.com/mdkinc/index.php?PAGE=tab_0/menu_0.php&amp;id_art=250&amp;LANG_=en#GOTO_250">Multi
Network Firewall (MNF)</a> product. Here is the <a
href="http://www.mandrakesoft.com/company/press/pr?n=/pr/products/2403">press
release</a>.<br>
<p><b>12/7/2002 - Shorewall Support for Mandrake 9.0</b><b>
</b></p>
</a></b></p>
Shorewall is at the center of MandrakeSofts's recently-announced
<a
href="http://www.mandrakestore.com/mdkinc/index.php?PAGE=tab_0/menu_0.php&amp;id_art=250&amp;LANG_=en#GOTO_250">Multi
Network Firewall (MNF)</a> product. Here is the <a
href="http://www.mandrakesoft.com/company/press/pr?n=/pr/products/2403">press
release</a>.<br>
<p>Two months and 3 days after I pre-ordered Mandrake 9.0, it was finally
delivered. I have installed 9.0 on one of my systems and I am now in
a position to support Shorewall users who run Mandrake 9.0.</p>
<p><b>12/6/2002 -  Debian 1.3.11a Packages Available</b><b></b><br>
</p>
<p>Apt-get sources listed at <a
href="http://security.dsi.unimi.it/%7Elorenzo/debian.html">http://security.dsi.unimi.it/~lorenzo/debian.html.</a></p>
<p><b>12/3/2002 - Shorewall 1.3.11a</b><b>
</b></p>
<p>This is a bug-fix roll up which includes Roger Aich's fix for DNAT
with excluded subnets (e.g., "DNAT foo!bar ..."). Current 1.3.11 users
who don't need rules of this type need not upgrade to 1.3.11.</p>
<p><b>11/25/2002 - Shorewall 1.3.11 Documentation in PDF Format</b><b>
<p><b>12/7/2002 - Shorewall Support for Mandrake 9.0</b><b>
</b></p>
<p>Juraj Ontkanin has produced a PDF containing the Shorewall 1.3.11
documenation. the PDF may be downloaded from</p>
<p>Two months and 3 days after I pre-ordered Mandrake 9.0, it was finally
delivered. I have installed 9.0 on one of my systems and I am now
in a position to support Shorewall users who run Mandrake 9.0.</p>
<p>    <a
href="ftp://slovakia.shorewall.net/mirror/shorewall/pdf/" target="_top">ftp://slovakia.shorewall.net/mirror/shorewall/pdf/</a><br>
    <a
href="http://slovakia.shorewall.net/pub/shorewall/pdf/">http://slovakia.shorewall.net/pub/shorewall/pdf/</a><br>
</p>
<p><b>12/6/2002 -  Debian 1.3.11a Packages Available</b><b></b><br>
</p>
<p><b>11/24/2002 - Shorewall 1.3.11</b><b>
</b></p>
<p>Apt-get sources listed at <a
href="http://security.dsi.unimi.it/%7Elorenzo/debian.html">http://security.dsi.unimi.it/~lorenzo/debian.html.</a></p>
<p><b>12/3/2002 - Shorewall 1.3.11a</b><b>
</b></p>
<p>This is a bug-fix roll up which includes Roger Aich's fix for DNAT
with excluded subnets (e.g., "DNAT foo!bar ..."). Current 1.3.11
users who don't need rules of this type need not upgrade to 1.3.11.</p>
<p><b>11/25/2002 - Shorewall 1.3.11 Documentation in PDF Format</b><b>
</b></p>
<p>Juraj Ontkanin has produced a PDF containing the Shorewall 1.3.11
documenation. the PDF may be downloaded from</p>
<p>    <a
href="ftp://slovakia.shorewall.net/mirror/shorewall/pdf/" target="_top">ftp://slovakia.shorewall.net/mirror/shorewall/pdf/</a><br>
    <a
href="http://slovakia.shorewall.net/pub/shorewall/pdf/">http://slovakia.shorewall.net/pub/shorewall/pdf/</a><br>
</p>
<p><b>11/24/2002 - Shorewall 1.3.11</b><b>
</b></p>
<p>In this version:</p>
<ul>
<li>A 'tcpflags' option has been added to entries
in <a href="Documentation.htm#Interfaces">/etc/shorewall/interfaces</a>.
This option causes Shorewall to make a set of sanity check on TCP packet
header flags.</li>
<li>It is now allowed to use 'all' in the SOURCE
or DEST column in a <a href="Documentation.htm#Rules">rule</a>. When
used, 'all' must appear by itself (in may not be qualified) and it
does not enable intra-zone traffic. For example, the rule <br>
<br>
    ACCEPT loc all tcp 80<br>
<br>
does not enable http traffic from 'loc' to 'loc'.</li>
<li>Shorewall's use of the 'echo' command is now
compatible with bash clones such as ash and dash.</li>
<li>fw-&gt;fw policies now generate a startup error.
fw-&gt;fw rules generate a warning and are ignored</li>
<ul>
<li>A 'tcpflags' option has been added to
entries in <a href="Documentation.htm#Interfaces">/etc/shorewall/interfaces</a>.
This option causes Shorewall to make a set of sanity check on TCP packet
header flags.</li>
<li>It is now allowed to use 'all' in the
SOURCE or DEST column in a <a href="Documentation.htm#Rules">rule</a>.
When used, 'all' must appear by itself (in may not be qualified)
and it does not enable intra-zone traffic. For example, the rule <br>
<br>
    ACCEPT loc all tcp 80<br>
<br>
does not enable http traffic from 'loc' to 'loc'.</li>
<li>Shorewall's use of the 'echo' command
is now compatible with bash clones such as ash and dash.</li>
<li>fw-&gt;fw policies now generate a startup
error. fw-&gt;fw rules generate a warning and are ignored</li>
</ul>
<p><b>11/14/2002 - Shorewall Documentation in PDF Format</b><b>
</b></p>
<p><b>11/14/2002 - Shorewall Documentation in PDF Format</b><b>
</b></p>
<p>Juraj Ontkanin has produced a PDF containing the Shorewall 1.3.10
documenation. the PDF may be downloaded from</p>
<p>Juraj Ontkanin has produced a PDF containing the Shorewall 1.3.10
documenation. the PDF may be downloaded from</p>
<p>    <a
href="ftp://slovakia.shorewall.net/mirror/shorewall/pdf/" target="_top">ftp://slovakia.shorewall.net/mirror/shorewall/pdf/</a><br>
    <a
    <a
href="http://slovakia.shorewall.net/pub/shorewall/pdf/">http://slovakia.shorewall.net/pub/shorewall/pdf/</a><br>
</p>
</p>
<p><b></b></p>
<ul>
</ul>
<p><b></b><a href="News.htm">More News</a></p>
@ -402,61 +503,81 @@ compatible with bash clones such as ash and dash.</li>
<h2> </h2>
<h1 align="center"><a href="http://www.sf.net"><img align="left"
alt="SourceForge Logo"
src="http://sourceforge.net/sflogo.php?group_id=22587&amp;type=3">
</a></h1>
</a></h1>
<h4> </h4>
<h2>This site is hosted by the generous folks at <a
href="http://www.sf.net">SourceForge.net</a> </h2>
<h2><a name="Donations"></a>Donations</h2>
</td>
</td>
<td width="88" bgcolor="#4b017c" valign="top"
align="center"> <br>
</td>
<td width="88" bgcolor="#4b017c"
valign="top" align="center"> <br>
</td>
</tr>
</tr>
</tbody>
</tbody>
</table>
</center>
</center>
</div>
</div>
<table border="0" cellpadding="5" cellspacing="0"
style="border-collapse: collapse;" width="100%" id="AutoNumber2"
bgcolor="#4b017c">
<tbody>
<tbody>
<tr>
<td width="100%" style="margin-top: 1px;">
<p align="center"><a href="http://www.starlight.org"> <img
border="4" src="images/newlog.gif" width="57" height="100" align="left"
hspace="10">
</a></p>
<tr>
<td width="100%" style="margin-top: 1px;">
@ -465,45 +586,30 @@ compatible with bash clones such as ash and dash.</li>
<p align="center"><a href="http://www.starlight.org"> <img
border="4" src="images/newlog.gif" width="57" height="100" align="left"
hspace="10">
<p align="center"><font size="4" color="#ffffff">Shorewall is free
but if you try it and find it useful, please consider making a donation
to <a
href="http://www.starlight.org"><font color="#ffffff">Starlight
Children's Foundation.</font></a> Thanks!</font></p>
</a></p>
</td>
</tr>
<p align="center"><font size="4" color="#ffffff">Shorewall is free but
if you try it and find it useful, please consider making a donation
to <a
href="http://www.starlight.org"><font color="#ffffff">Starlight Children's
Foundation.</font></a> Thanks!</font></p>
</td>
</tr>
</tbody>
</tbody>
</table>
<p><font size="2">Updated 12/22/2002 - <a href="support.htm">Tom Eastep</a></font>
<br>
</p>
<br>
<p><font size="2">Updated 1/6/2003 - <a href="support.htm">Tom Eastep</a></font>
<br>
</p>
<br>
</body>
</html>

329
Shorewall-docs/starting_and_stopping_shorewall.htm
View File

@ -1,13 +1,13 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Language" content="en-us">
<meta name="GENERATOR" content="Microsoft FrontPage 5.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<meta http-equiv="Content-Type"
content="text/html; charset=windows-1252">
<title>Starting and Stopping Shorewall</title>
@ -15,231 +15,238 @@
<body>
<table border="0" cellpadding="0" cellspacing="0"
style="border-collapse: collapse;" bordercolor="#111111" width="100%"
id="AutoNumber1" bgcolor="#400169" height="90">
<tbody>
<tr>
<tbody>
<tr>
<td width="100%">
<h1 align="center"><font color="#ffffff">Starting/Stopping and Monitoring
the Firewall</font></h1>
<td width="100%">
</td>
<h1 align="center"><font color="#ffffff">Starting/Stopping and Monitoring
the Firewall</font></h1>
</tr>
</td>
</tbody>
</tr>
</tbody>
</table>
<p> If you have a permanent internet connection such as DSL or Cable,
I recommend that you start the firewall automatically at boot. Once
you have installed "firewall" in your init.d directory, simply type
"chkconfig --add firewall". This will start the firewall in run levels
2-5 and stop it in run levels 1 and 6. If you want to configure your
firewall differently from this default, you can use the "--level" option
in chkconfig (see "man chkconfig") or using your favorite graphical
run-level editor.</p>
<p><strong><u> <font color="#000099"> Important Notes:</font></u></strong><br>
</p>
<ol>
<li>Shorewall startup is disabled by default. Once you have configured
your firewall, you can enable startup by removing the file /etc/shorewall/startup_disabled.
Note: Users of the .deb package must edit /etc/default/shorewall and set
'startup=1'.<br>
</li>
<li>If you use dialup, you may want to start the firewall in your
/etc/ppp/ip-up.local script. I recommend just placing "shorewall restart"
in that script.</li>
</ol>
<p>
</p>
<p> You can manually start and stop Shoreline Firewall using the "shorewall"
<p> If you have a permanent internet connection such as DSL or Cable,
I recommend that you start the firewall automatically at boot. Once
you have installed "firewall" in your init.d directory, simply type
"chkconfig --add firewall". This will start the firewall in run
levels 2-5 and stop it in run levels 1 and 6. If you want to configure
your firewall differently from this default, you can use the "--level"
option in chkconfig (see "man chkconfig") or using your favorite
graphical run-level editor.</p>
<p><strong><u> <font color="#000099"> Important Notes:</font></u></strong><br>
</p>
<ol>
<li>Shorewall startup is disabled by default. Once you have configured
your firewall, you can enable startup by removing the file /etc/shorewall/startup_disabled.
Note: Users of the .deb package must edit /etc/default/shorewall and set
'startup=1'.<br>
</li>
<li>If you use dialup, you may want to start the firewall in your
/etc/ppp/ip-up.local script. I recommend just placing "shorewall restart"
in that script.</li>
</ol>
<p>
</p>
<p> You can manually start and stop Shoreline Firewall using the "shorewall"
shell program: </p>
<ul>
<li>shorewall start - starts the firewall</li>
<li>shorewall stop - stops the firewall</li>
<li>shorewall restart - stops the firewall (if it's running)
and then starts it again</li>
<li>shorewall reset - reset the packet and byte counters
in the firewall</li>
<li>shorewall clear - remove all rules and chains installed
by Shoreline Firewall</li>
<li>shorewall refresh - refresh the rules involving the broadcast
<li>shorewall start - starts the firewall</li>
<li>shorewall stop - stops the firewall</li>
<li>shorewall restart - stops the firewall (if it's running)
and then starts it again</li>
<li>shorewall reset - reset the packet and byte counters
in the firewall</li>
<li>shorewall clear - remove all rules and chains installed
by Shoreline Firewall</li>
<li>shorewall refresh - refresh the rules involving the broadcast
addresses of firewall interfaces and the black and white lists.</li>
</ul>
If you include the keyword <i>debug</i> as the first argument, then a shell
trace of the command is produced as in:<br>
<pre> <font color="#009900"><b>shorewall debug start 2&gt; /tmp/trace</b></font><br></pre>
<p>The above command would trace the 'start' command and place the trace
information in the file /tmp/trace</p>
<p> The "shorewall" program may also be used to monitor the firewall.</p>
<ul>
<li>shorewall status - produce a verbose report about the firewall
(iptables -L -n -v)</li>
<li>shorewall show <i>chain</i> - produce a verbose report about <i>chain
</i>(iptables -L <i>chain</i> -n -v)</li>
<li>shorewall show nat - produce a verbose report about the nat table
(iptables -t nat -L -n -v)</li>
<li>shorewall show tos - produce a verbose report about the mangle
table (iptables -t mangle -L -n -v)</li>
<li>shorewall show log - display the last 20 packet log entries.</li>
<li>shorewall show connections - displays the IP connections currently
being tracked by the firewall.</li>
<li>shorewall
show
tc - displays information
about the traffic control/shaping configuration.</li>
<li>shorewall monitor [ delay ] - Continuously display the firewall
status, last 20 log entries and nat. When the log entry display
changes, an audible alarm is sounded.</li>
<li>shorewall hits - Produces several reports about the Shorewall
<li>shorewall status - produce a verbose report about the firewall
(iptables -L -n -v)</li>
<li>shorewall show <i>chain</i> - produce a verbose report about
<i>chain </i>(iptables -L <i>chain</i> -n -v)</li>
<li>shorewall show nat - produce a verbose report about the nat table
(iptables -t nat -L -n -v)</li>
<li>shorewall show tos - produce a verbose report about the mangle
table (iptables -t mangle -L -n -v)</li>
<li>shorewall show log - display the last 20 packet log entries.</li>
<li>shorewall show connections - displays the IP connections currently
being tracked by the firewall.</li>
<li>shorewall
show
tc - displays information
about the traffic control/shaping configuration.</li>
<li>shorewall monitor [ delay ] - Continuously display the firewall
status, last 20 log entries and nat. When the log entry display
changes, an audible alarm is sounded.</li>
<li>shorewall hits - Produces several reports about the Shorewall
packet log messages in the current /var/log/messages file.</li>
<li>shorewall version - Displays the installed version number.</li>
<li>shorewall check - Performs a <u>cursory</u> validation of
the zones, interfaces, hosts, rules and policy files. <font size="4"
color="#ff6666"><b>The "check" command does not parse and validate the
generated iptables commands so even though the "check" command completes
successfully, the configuration may fail to start. See the recommended
way to make configuration changes described below. </b></font> </li>
<li>shorewall try<i> configuration-directory</i> [<i> timeout</i>
] - Restart shorewall using the specified configuration and if an error
occurs or if the<i> timeout </i> option is given and the new configuration
has been up for that many seconds then shorewall is restarted using the
standard configuration.</li>
<li>shorewall deny, shorewall reject, shorewall accept and shorewall
save implement <a href="blacklisting_support.htm">dynamic blacklisting</a>.</li>
<li>shorewall logwatch (added in version 1.3.2) - Monitors the
<a href="#Conf">LOGFILE </a>and produces an audible alarm when new Shorewall
messages are logged.</li>
<li>shorewall version - Displays the installed version number.</li>
<li>shorewall check - Performs a <u>cursory</u> validation of
the zones, interfaces, hosts, rules and policy files. <font
size="4" color="#ff6666"><b>The "check" command does not parse and validate
the generated iptables commands so even though the "check" command
completes successfully, the configuration may fail to start. See the
recommended way to make configuration changes described below. </b></font>
</li>
<li>shorewall try<i> configuration-directory</i> [<i> timeout</i>
] - Restart shorewall using the specified configuration and if an error
occurs or if the<i> timeout </i> option is given and the new configuration
has been up for that many seconds then shorewall is restarted using
the standard configuration.</li>
<li>shorewall deny, shorewall reject, shorewall accept and shorewall
save implement <a href="blacklisting_support.htm">dynamic blacklisting</a>.</li>
<li>shorewall logwatch (added in version 1.3.2) - Monitors the
<a href="#Conf">LOGFILE </a>and produces an audible alarm when new Shorewall
messages are logged.</li>
</ul>
Finally, the "shorewall" program may be used to dynamically alter the contents
of a zone.<br>
<ul>
<li>shorewall add <i>interface</i>[:<i>host]</i> <i>zone </i>- Adds the
specified interface (and host if included) to the specified zone.</li>
<li>shorewall delete <i>interface</i>[:<i>host]</i> <i>zone </i>- Deletes
the specified interface (and host if included) from the specified zone.</li>
</ul>
<blockquote>Examples:<br>
Finally, the "shorewall" program may be used to dynamically alter the contents
of a zone.<br>
<blockquote>shorewall add ipsec0:192.0.2.24 vpn1 -- adds the address 192.0.2.24
from interface ipsec0 to the zone vpn1<br>
shorewall delete ipsec0:192.0.2.24 vpn1 -- deletes the address 192.0.2.24
from interface ipsec0 from zone vpn1<br>
</blockquote>
</blockquote>
<ul>
<li>shorewall add <i>interface</i>[:<i>host]</i> <i>zone </i>- Adds the
specified interface (and host if included) to the specified zone.</li>
<li>shorewall delete <i>interface</i>[:<i>host]</i> <i>zone </i>- Deletes
the specified interface (and host if included) from the specified zone.</li>
</ul>
<blockquote>Examples:<br>
<blockquote><font color="#009900"><b>shorewall add ipsec0:192.0.2.24 vpn1</b></font>
-- adds the address 192.0.2.24 from interface ipsec0 to the zone vpn1<br>
<font color="#009900"><b> shorewall delete ipsec0:192.0.2.24 vpn1</b></font>
-- deletes the address 192.0.2.24 from interface ipsec0 from zone vpn1<br>
</blockquote>
</blockquote>
<p> The <b>shorewall start</b>, <b>shorewall restart, shorewall check </b> and
<p> The <b>shorewall start</b>, <b>shorewall restart, shorewall check </b> and
<b>shorewall try </b>commands allow you to specify which <a
href="configuration_file_basics.htm#Configs"> Shorewall configuration</a>
href="configuration_file_basics.htm#Configs"> Shorewall configuration</a>
to use:</p>
<blockquote>
<blockquote>
<p> shorewall [ -c <i>configuration-directory</i> ] {start|restart|check}<br>
shorewall try <i>configuration-directory</i></p>
</blockquote>
shorewall try <i>configuration-directory</i></p>
</blockquote>
<p> If a <i>configuration-directory</i> is specified, each time that Shorewall
is going to use a file in /etc/shorewall it will first look in the <i>configuration-directory</i>
. If the file is present in the <i>configuration-directory</i>, that
file will be used; otherwise, the file in /etc/shorewall will be used.</p>
<p> If a <i>configuration-directory</i> is specified, each time that Shorewall
is going to use a file in /etc/shorewall it will first look in the <i>configuration-directory</i>
. If the file is present in the <i>configuration-directory</i>, that file
will be used; otherwise, the file in /etc/shorewall will be used.</p>
<p> When changing the configuration of a production firewall, I recommend
the following:</p>
<p> When changing the configuration of a production firewall, I recommend
the following:</p>
<ul>
<li>mkdir /etc/test</li>
<li><font color="#009900"><b>mkdir /etc/test</b></font></li>
<li>cd /etc/test</li>
<li><font color="#009900"><b>cd /etc/test</b></font></li>
<li>&lt;copy any files that you need to change from /etc/shorewall
to . and change them here&gt;</li>
<li>&lt;copy any files that you need to change from /etc/shorewall
to . and change them here&gt;</li>
<li>shorewall -c . check</li>
<li><font color="#009900"><b>shorewall -c . check</b></font></li>
<li>&lt;correct any errors found by check and check again&gt;</li>
<li>&lt;correct any errors found by check and check again&gt;</li>
<li>/sbin/shorewall try .</li>
<li><font color="#009900"><b>/sbin/shorewall try .</b></font></li>
</ul>
<p> If the configuration starts but doesn't work, just "shorewall restart"
to restore the old configuration. If the new configuration fails to start,
the "try" command will automatically start the old one for you.</p>
<p> If the configuration starts but doesn't work, just "shorewall restart"
to restore the old configuration. If the new configuration fails to start,
the "try" command will automatically start the old one for you.</p>
<p> When the new configuration works then just </p>
<ul>
<li>cp * /etc/shorewall</li>
<li><font color="#009900"><b>cp * /etc/shorewall</b></font></li>
<li>cd</li>
<li><font color="#009900"><b>cd</b></font></li>
<li>rm -rf /etc/test</li>
<li><font color="#009900"><b>rm -rf /etc/test</b></font></li>
</ul>
<p><font size="2"> Updated 11/21/2002 - <a href="support.htm">Tom Eastep</a>
<p><font size="2"> Updated 1/9/2003 - <a href="support.htm">Tom Eastep</a>
</font></p>
<p><font face="Trebuchet MS"><a href="copyright.htm"><font size="2">Copyright</font>
© <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font></p>
<p><font face="Trebuchet MS"><a href="copyright.htm"><font size="2">Copyright</font>
© <font size="2">2001, 2002, 2003 Thomas M. Eastep.</font></a></font></p>
<br>
<br>
<br>
<br>
<br>
<br>

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<html>
<head>
<meta http-equiv="Content-Language" content="en-us">
<meta http-equiv="Content-Type"
content="text/html; charset=windows-1252">
<meta name="GENERATOR" content="Microsoft FrontPage 5.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<title>Support</title>
<meta name="Microsoft Theme" content="none">
</head>
<body>
<table border="0" cellpadding="0" cellspacing="0"
style="border-collapse: collapse;" width="100%" id="AutoNumber1"
bgcolor="#400169" height="90">
<tbody>
<tr>
<td width="100%">
<tbody>
<tr>
<td width="100%">
<h1 align="center"><font color="#ffffff">Shorewall Support<img
src="images/obrasinf.gif" alt="" width="90" height="90" align="middle">
</font></h1>
</td>
</tr>
</font></h1>
</td>
</tr>
</tbody>
</tbody>
</table>
<p> <br>
<span style="font-weight: 400;"></span></p>
<h2><big><font color="#ff0000"><b>I don't look at problems sent to me directly
but I try to spend some amount of time each day responding to
problems posted on the Shorewall mailing list.</b></font></big></h2>
<h2 align="center"><big><font color="#ff0000"><b>-Tom</b></font></big></h2>
<p> <b><big><big><font color="#ff0000">Due to "Shorewall burnout", I am currently
not involved in either Shorewall development or Shorewall support. Nevertheless,
the mailing list is being ably manned by other Shorewall users.</font></big><span
style="font-weight: 400;"></span></big></b></p>
<h2 align="center"><big><font color="#ff0000"><b>-Tom Eastep</b></font></big></h2>
<h2>Before Reporting a Problem</h2>
<h3>T<b>here are a number of sources for problem solution information. Please
try these before you post.</b></h3>
There are a number of sources for problem
solution information. Please try these before you post.
<h3> </h3>
<h3> </h3>
<ul>
<li>
<h3><b>The <a href="FAQ.htm">FAQ</a> has solutions to more than 20 common
problems.</b></h3>
</li>
<li>More than half of the questions posted on the support list
have answers directly accessible from the <a
href="shorewall_quickstart_guide.htm#Documentation">Documentation Index</a><br>
<br>
</li>
<li> The <a href="FAQ.htm">FAQ</a>
has solutions to more than 20 common problems. </li>
</ul>
<h3> </h3>
<ul>
<li>
<h3><b>The <a href="troubleshoot.htm">Troubleshooting</a> Information
contains a number of tips to help you solve common problems.</b></h3>
</li>
<li> The <a
href="troubleshoot.htm">Troubleshooting</a> Information contains
a number of tips to help you solve common problems. </li>
</ul>
<h3> </h3>
<ul>
<li>
<h3><b>The <a href="errata.htm"> Errata</a> has links to download
updated components.</b></h3>
</li>
<li> The <a
href="errata.htm"> Errata</a> has links to download updated
components. </li>
</ul>
<h3> </h3>
<ul>
<li>
<h3><b>The Mailing List Archives search facility can locate posts
about similar problems:</b></h3>
<li> The Mailing List Archives
search facility can locate posts about similar problems:
</li>
</ul>
<h2> </h2>
<h2>Mailing List Archive Search</h2>
<form method="post" action="http://www.shorewall.net/cgi-bin/htsearch">
<p> <font size="-1"> Match:
<select name="method">
<option value="and">All </option>
<option value="or">Any </option>
<option value="boolean">Boolean </option>
</select>
Format:
Format:
<select name="format">
<option value="builtin-long">Long </option>
<option value="builtin-short">Short </option>
</select>
Sort by:
Sort by:
<select name="sort">
<option value="score">Score </option>
<option value="time">Time </option>
@ -125,166 +124,239 @@ problems posted on the Shorewall mailing list.</b></font></big></h2>
<option value="revtime">Reverse Time </option>
<option value="revtitle">Reverse Title </option>
</select>
</font> <input type="hidden" name="config"
</font> <input type="hidden" name="config"
value="htdig"> <input type="hidden" name="restrict"
value="[http://www.shorewall.net/pipermail/.*]"> <input type="hidden"
value="[http://mail.shorewall.net/pipermail/.*]"> <input type="hidden"
name="exclude" value=""> <br>
Search: <input type="text" size="30" name="words"
value=""> <input type="submit" value="Search"> </p>
</form>
<h2>Problem Reporting Guidelines</h2>
<i>"Let me see if I can translate your message into a real-world example. 
It would be like saying that you have three rooms at home, and when you
walk into one of the rooms, you detect this strange smell.  Can anyone tell
you what that strange smell is?<br>
<br>
Now, all of us could do some wonderful guessing as to the smell and even
what's causing it.  You would be absolutely amazed at the range and variety
of smells we could come up with.  Even more amazing is that all of the
explanations for the smells would be completely plausible."<br>
</i><br>
Search: <input type="text" size="30"
name="words" value=""> <input type="submit" value="Search"> </p>
</form>
<h2>Problem Reporting Guidelines </h2>
<i>"Let me see if I can translate your message into a real-world
example. It would be like saying that you have three rooms at home,
and when you walk into one of the rooms, you detect this strange smell.
Can anyone tell you what that strange smell is?<br>
<br>
Now, all of us could do some wonderful guessing as to the smell
and even what's causing it. You would be absolutely amazed at the range
and variety of smells we could come up with. Even more amazing is that
all of the explanations for the smells would be completely plausible."<br>
</i><br>
<div align="center"> - <i>Russell Mosemann</i> on the Postfix mailing list<br>
</div>
<br>
<h3> </h3>
<ul>
<li>Please remember we only know what is posted in your message. Do
not leave out any information that appears to be correct, or was mentioned
in a previous post. There have been countless posts by people who were
sure that some part of their configuration was correct when it actually
contained a small error. We tend to be skeptics where detail is lacking.<br>
<br>
</li>
<li>Please keep in mind that you're asking for <strong>free</strong>
technical support. Any help we offer is an act of generosity, not an obligation.
Try to make it easy for us to help you. Follow good, courteous practices
in writing and formatting your e-mail. Provide details that we need if
you expect good answers. <em>Exact quoting </em> of error messages, log
entries, command output, and other output is better than a paraphrase or
summary.<br>
<br>
</li>
<li> Please don't describe your environment
and then ask us to send you custom configuration files.
We're here to answer your questions but we can't do your
job for you.<br>
<br>
</li>
<li>When reporting a problem, <strong>ALWAYS</strong> include this
information:</li>
<div align="center">   - Russell Mosemann<br>
</div>
<br>
<h3> </h3>
<ul>
<li>
<h3><b>When reporting a problem, give as much information as you can.
Reports that say "I tried XYZ and it didn't work" are not at all helpful.</b></h3>
</li>
</ul>
<h3> </h3>
<ul>
<li>
<h3><b>Please don't describe your environment and then ask us to send
you custom configuration files. We're here to answer your
questions but we can't do your job for you.</b></h3>
</li>
<ul>
<li>the exact version of Shorewall you are running.<br>
<br>
<b><font color="#009900">shorewall version</font><br>
</b> <br>
</li>
</ul>
<ul>
<li>the exact kernel version you are running<br>
<br>
<font color="#009900"><b>uname -a<br>
<br>
</b></font></li>
</ul>
<ul>
<li>the complete, exact output of<br>
<br>
<font color="#009900"><b>ip addr show<br>
<br>
</b></font></li>
</ul>
<ul>
<li>the complete, exact output of<br>
<br>
<font color="#009900"><b>ip route show<br>
<br>
</b></font></li>
</ul>
<ul>
<li>If your kernel is modularized, the exact output from<br>
<br>
<font color="#009900"><b>lsmod</b></font><br>
<br>
</li>
<li>the exact wording of any <code
style="color: green; font-weight: bold;">ping</code> failure responses.<br>
<br>
</li>
</ul>
</ul>
<h3> </h3>
<ul>
<li>
<h3><b>Do you see any "Shorewall" messages in /var/log/messages
when you exercise the function that is giving you problems?</b></h3>
</li>
<li><b>NEVER </b>include the output of "<b><font color="#009900">iptables
-L</font></b>". Instead, please post the exact output of<br>
<br>
<b><font color="#009900">/sbin/shorewall status<br>
<br>
</font></b>Since that command generates a lot of output, we suggest
that you redirect the output to a file and attach the file to your post<br>
<br>
<b><font color="#009900">/sbin/shorewall status &gt; /tmp/status.txt</font></b><br>
<br>
</li>
<li>As a general matter, please <strong>do not edit the diagnostic
information</strong> in an attempt to conceal your IP address, netmask,
nameserver addresses, domain name, etc. These aren't secrets, and concealing
them often misleads us (and 80% of the time, a hacker could derive them
anyway from information contained in the SMTP headers of your post).<strong></strong></li>
</ul>
<h3> </h3>
<ul>
<li>
<h3><b>Have you looked at the packet flow with a tool like tcpdump
to try to understand what is going on?</b></h3>
</li>
</ul>
<h3> </h3>
<ul>
<li>
<h3><b>Have you tried using the diagnostic capabilities of the
application that isn't working? For example, if "ssh" isn't able
to connect, using the "-v" option gives you a lot of valuable diagnostic
information.</b></h3>
</li>
</ul>
<h3> </h3>
<ul>
<li>
<h3><b>Please include any of the Shorewall configuration files (especially
the /etc/shorewall/hosts file if you have modified that file)
that you think are relevant.</b></h3>
</li>
<li>
<h3><b>If an error occurs when you try to "shorewall start", include
a trace (See the <a href="troubleshoot.htm">Troubleshooting</a> section
for instructions).</b></h3>
</li>
</ul>
<h3> </h3>
<ul>
<li>
<h3><b>The list server limits posts to 120kb so don't post GIFs of
your network layout, etc to the Mailing List -- your post
will be rejected.</b></h3>
</li>
</ul>
<h3> </h3>
<br>
<h2>Please post in plain text</h2>
<blockquote>
<h3> A growing number of MTAs serving list subscribers are rejecting all
HTML traffic. At least one MTA has gone so far as to blacklist shorewall.net
"for continuous abuse" because it has been my policy to allow HTML in list
posts!!<br>
<br>
I think that blocking all HTML is a Draconian way to control spam and
that the ultimate losers here are not the spammers but the list subscribers
whose MTAs are bouncing all shorewall.net mail. As one list subscriber wrote
to me privately "These e-mail admin's need to get a <i>(explitive deleted)</i>
life instead of trying to rid the planet of HTML based e-mail". Nevertheless,
to allow subscribers to receive list posts as must as possible, I have now
configured the list server at shorewall.net to strip all HTML from outgoing
posts.<br>
</h3>
<h3></h3>
</blockquote>
<h2>Where to Send your Problem Report or to Ask for Help</h2>
<h3></h3>
<blockquote>
</ul>
<h3> </h3>
<ul>
</ul>
<h3> </h3>
<ul>
<li> Do you see any "Shorewall"
messages ("<b><font color="#009900">/sbin/shorewall show log</font></b>")
when you exercise the function that is giving you problems? If
so, include the message(s) in your post along with a copy of your /etc/shorewall/interfaces
file.<br>
<br>
</li>
<li>Please include any of the Shorewall configuration files (especially
the /etc/shorewall/hosts file if you have modified that file)
that you think are relevant. If you include /etc/shorewall/rules,
please include /etc/shorewall/policy as well (rules are meaningless unless
one also knows the policies). </li>
</ul>
<h3> </h3>
<ul>
</ul>
<h3> </h3>
<ul>
<li> If an error occurs when
you try to "<font color="#009900"><b>shorewall start</b></font>",
include a trace (See the <a href="troubleshoot.htm">Troubleshooting</a>
section for instructions). </li>
</ul>
<h3> </h3>
<ul>
<li>
<h3><b>The list server limits posts to 120kb so don't post GIFs of
your network layout, etc. to the Mailing List -- your
post will be rejected.</b></h3>
</li>
</ul>
The author gratefully acknowleges that the above list was heavily plagiarized
from the excellent LEAF document by <i>Ray</i> <em>Olszewski</em> found
at <a href="http://leaf-project.org/pub/doc/docmanager/docid_1891.html">http://leaf-project.org/pub/doc/docmanager/docid_1891.html</a>.<br>
<h2>Please post in plain text</h2>
<blockquote> </blockquote>
A growing number of MTAs serving list subscribers are rejecting all
HTML traffic. At least one MTA has gone so far as to blacklist shorewall.net
"for continuous abuse" because it has been my policy to allow HTML in list
posts!!<br>
<br>
I think that blocking all HTML is a Draconian way to control spam
and that the ultimate losers here are not the spammers but the list subscribers
whose MTAs are bouncing all shorewall.net mail. As one list subscriber
wrote to me privately "These e-mail admin's need to get a <i>(expletive
deleted)</i> life instead of trying to rid the planet of HTML based e-mail".
Nevertheless, to allow subscribers to receive list posts as must as possible,
I have now configured the list server at shorewall.net to strip all HTML
from outgoing posts.<br>
<h2>Where to Send your Problem Report or to Ask for Help</h2>
<blockquote>
<h4>If you run Shorewall under Bering -- <span
style="font-weight: 400;">please post your question or problem
to the <a href="mailto:leaf-user@lists.sourceforge.net">LEAF Users mailing
list</a>.</span></h4>
<b>If you run Shorewall under MandrakeSoft Multi Network Firewall (MNF)
and you have not purchased an MNF license from MandrakeSoft then you can post
non MNF-specific Shorewall questions to the </b><a
to the <a href="mailto:leaf-user@lists.sourceforge.net">LEAF Users mailing
list</a>.</span></h4>
<b>If you run Shorewall under MandrakeSoft Multi Network Firewall
(MNF) and you have not purchased an MNF license from MandrakeSoft then
you can post non MNF-specific Shorewall questions to the </b><a
href="mailto:shorewall-users@shorewall.net">Shorewall users mailing list.</a>
<b>Do not expect to get free MNF support on the list.</b><br>
<b>Do not expect to get free MNF support on the list.</b><br>
<p>Otherwise, please post your question or problem to the <a
href="mailto:shorewall-users@shorewall.net">Shorewall users mailing list.</a></p>
</blockquote>
</blockquote>
<p align="center"><big><font color="#ff0000"><b></b></font></big></p>
<p>To Subscribe to the mailing list go to <a
href="http://mail.shorewall.net/mailman/listinfo/shorewall-users">http://mail.shorewall.net/mailman/listinfo/shorewall-users</a>
.</p>
.</p>
<p align="left"><font size="2">Last Updated 12/29/2002 - Tom Eastep</font></p>
<p align="left"><font size="2">Last Updated 1/9/2002 - Tom Eastep</font></p>
<p align="left"><font face="Trebuchet MS"><a href="copyright.htm"> <font
size="2">Copyright</font> © <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font><br>
</p>
<br>
size="2">Copyright</font> © <font size="2">2001, 2002, 2003 Thomas M. Eastep.</font></a></font><br>
</p>
<br>
</body>
</html>

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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Language" content="en-us">
<meta http-equiv="Content-Type"
content="text/html; charset=windows-1252">
<meta name="GENERATOR" content="Microsoft FrontPage 5.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<title>Traffic Shaping</title>
</head>
<body>
<table border="0" cellpadding="0" cellspacing="0"
style="border-collapse: collapse;" bordercolor="#111111" width="100%"
id="AutoNumber1" bgcolor="#400169" height="90">
<tbody>
<tr>
<td width="100%">
<tbody>
<tr>
<td width="100%">
<h1 align="center"><font color="#ffffff">Traffic Shaping/Control</font></h1>
</td>
</tr>
</tbody>
</td>
</tr>
</tbody>
</table>
<p align="left">Beginning with version 1.2.0, Shorewall has limited support
for traffic shaping/control. In order to use traffic shaping under Shorewall,
it is essential that you get a copy of the <a
for traffic shaping/control. In order to use traffic shaping under Shorewall,
it is essential that you get a copy of the <a
href="http://ds9a.nl/lartc">Linux Advanced Routing and Shaping HOWTO</a>,
version 0.3.0 or later. You must also install the iproute (iproute2) package
to provide the "ip" and "tc" utilities.</p>
version 0.3.0 or later. You must also install the iproute (iproute2) package
to provide the "ip" and "tc" utilities.</p>
<p align="left">Shorewall traffic shaping support consists of the following:</p>
<ul>
<li>A new TC_ENABLED parameter in /etc/shorewall.conf. Traffic
Shaping also requires that you enable packet mangling.<br>
</li>
<li>/etc/shorewall/tcrules - A file where you can specify firewall
marking of packets. The firewall mark value may be used to classify
packets for traffic shaping/control.<br>
</li>
<li>/etc/shorewall/tcstart - A user-supplied file that is sourced
by Shorewall during "shorewall start" and which you can use to define
your traffic shaping disciplines and classes. I have provided a <a
href="ftp://ftp.shorewall.net/pub/shorewall/cbq">sample</a> that does
table-driven CBQ shaping but if you read the traffic shaping sections of
the HOWTO mentioned above, you can probably code your own faster than
you can learn how to use my sample. I personally use <a
href="http://luxik.cdi.cz/%7Edevik/qos/htb/">HTB</a> (see below). HTB
support may eventually become an integral part of Shorewall since
HTB is a lot simpler and better-documented than CBQ. As of 2.4.20,
<li>A new <b>TC_ENABLED</b> parameter in /etc/shorewall.conf.
Traffic Shaping also requires that you enable packet mangling.</li>
<li>A new <b>CLEAR_TC </b>parameter in /etc/shorewall.conf (Added in Shorewall
1.3.13). When Traffic Shaping is enabled (TC_ENABLED=Yes), the setting of
this variable determines whether Shorewall clears the traffic shaping configuration
during Shorewall [re]start and Shorewall stop. <br>
</li>
<li><b>/etc/shorewall/tcrules</b> - A file where you can specify
firewall marking of packets. The firewall mark value may be used to
classify packets for traffic shaping/control.<br>
</li>
<li><b>/etc/shorewall/tcstart </b>- A user-supplied file that
is sourced by Shorewall during "shorewall start" and which you can
use to define your traffic shaping disciplines and classes. I have
provided a <a href="ftp://ftp.shorewall.net/pub/shorewall/cbq">sample</a>
that does table-driven CBQ shaping but if you read the traffic shaping
sections of the HOWTO mentioned above, you can probably code your
own faster than you can learn how to use my sample. I personally use
<a href="http://luxik.cdi.cz/%7Edevik/qos/htb/">HTB</a> (see below).
HTB support may eventually become an integral part of Shorewall since
HTB is a lot simpler and better-documented than CBQ. As of 2.4.20,
HTB is a standard part of the kernel but iproute2 must be patched in
order to use it.<br>
<br>
In tcstart, when you want to run the 'tc' utility, use the run_tc
function supplied by shorewall if you want tc errors to stop the firewall.<br>
<br>
You can generally use off-the-shelf traffic shaping scripts by simply copying
them to /etc/shorewall/tcstart. I use <a
<br>
In tcstart, when you want to run the 'tc' utility, use the
run_tc function supplied by shorewall if you want tc errors to stop
the firewall.<br>
<br>
You can generally use off-the-shelf traffic shaping scripts by simply
copying them to /etc/shorewall/tcstart. I use <a
href="http://lartc.org/wondershaper/">The Wonder Shaper</a> (HTB version)
that way (i.e., I just copied wshaper.htb to /etc/shorewall/tcstart and
that way (i.e., I just copied wshaper.htb to /etc/shorewall/tcstart and
modified it according to the Wonder Shaper README). <b>WARNING: </b>If you
use use Masquerading or SNAT (i.e., you only have one external IP address)
then listing internal hosts in the NOPRIOHOSTSRC variable in the wshaper[.htb]
script won't work. Traffic shaping occurs after SNAT has already been applied
so when traffic shaping happens, all outbound traffic will have as a source
address the IP addresss of your firewall's external interface.<br>
</li>
<li>/etc/shorewall/tcclear - A user-supplied file that is sourced
by Shorewall when it is clearing traffic shaping. This file is normally
not required as Shorewall's method of clearing qdisc and filter definitions
is pretty general.</li>
address the IP addresss of your firewall's external interface.<br>
</li>
<li><b>/etc/shorewall/tcclear</b> - A user-supplied file that
is sourced by Shorewall when it is clearing traffic shaping. This
file is normally not required as Shorewall's method of clearing qdisc
and filter definitions is pretty general.</li>
</ul>
Shorewall allows you to start traffic shaping when Shorewall itself starts
or it allows you to bring up traffic shaping when you bring up your interfaces.<br>
<br>
To start traffic shaping when Shorewall starts:<br>
<ol>
<li>Set TC_ENABLED=Yes and CLEAR_TC=Yes</li>
<li>Supply an /etc/shorewall/tcstart script to configure your traffic shaping
rules.</li>
<li>Optionally supply an /etc/shorewall/tcclear script to stop traffic
shaping. That is usually unnecessary.</li>
<li>If your tcstart script uses the 'fwmark' classifier, you can mark packets
using entries in /etc/shorewall/tcrules.</li>
</ol>
To start traffic shaping when you bring up your network interfaces, you will
have to arrange for your traffic shaping configuration script to be run at
that time. How you do that is distribution dependent and will not be covered
here. You then should:<br>
<ol>
<li>Set TC_ENABLED=Yes and CLEAR_TC=No</li>
<li>Do not supply /etc/shorewall/tcstart or /etc/shorewall/tcclear scripts.</li>
<li value="4">If your tcstart script uses the 'fwmark' classifier, you
can mark packets using entries in /etc/shorewall/tcrules.</li>
</ol>
<h3 align="left">Kernel Configuration</h3>
<p align="left">This screen shot show how I've configured QoS in my Kernel:</p>
<p align="center"><img border="0" src="images/QoS.png" width="590"
height="764">
</p>
</p>
<h3 align="left"><a name="tcrules"></a>/etc/shorewall/tcrules</h3>
<p align="left">The fwmark classifier provides a convenient way to classify
packets for traffic shaping. The /etc/shorewall/tcrules file provides
a means for specifying these marks in a tabular fashion.<br>
</p>
packets for traffic shaping. The /etc/shorewall/tcrules file provides
a means for specifying these marks in a tabular fashion.<br>
</p>
<p align="left">Normally, packet marking occurs in the PREROUTING chain before
any address rewriting takes place. This makes it impossible to mark inbound
packets based on their destination address when SNAT or Masquerading are
any address rewriting takes place. This makes it impossible to mark inbound
packets based on their destination address when SNAT or Masquerading are
being used. Beginning with Shorewall 1.3.12, you can cause packet marking
to occur in the FORWARD chain by using the MARK_IN_FORWARD_CHAIN option in
<a href="Documentation.htm#Conf">shorewall.conf</a>.<br>
</p>
</p>
<p align="left">Columns in the file are as follows:</p>
<ul>
<li>MARK - Specifies the mark value is to be assigned in case of
a match. This is an integer in the range 1-255.<br>
<br>
Example - 5<br>
</li>
<li>SOURCE - The source of the packet. If the packet originates
on the firewall, place "fw" in this column. Otherwise, this is a
comma-separated list of interface names, IP addresses, MAC addresses in
<li>MARK - Specifies the mark value is to be assigned in case
of a match. This is an integer in the range 1-255.<br>
<br>
Example - 5<br>
</li>
<li>SOURCE - The source of the packet. If the packet originates
on the firewall, place "fw" in this column. Otherwise, this is a
comma-separated list of interface names, IP addresses, MAC addresses in
<a href="Documentation.htm#MAC">Shorewall Format</a> and/or Subnets.<br>
<br>
Examples<br>
    eth0<br>
    192.168.2.4,192.168.1.0/24<br>
</li>
<li>DEST -- Destination of the packet. Comma-separated list of
IP addresses and/or subnets.<br>
</li>
<li>PROTO - Protocol - Must be the name of a protocol from
/etc/protocol, a number or "all"<br>
</li>
<li>PORT(S) - Destination Ports. A comma-separated list of Port
names (from /etc/services), port numbers or port ranges (e.g., 21:22);
if the protocol is "icmp", this column is interpreted as the destination
icmp type(s).<br>
</li>
<li>CLIENT PORT(S) - (Optional) Port(s) used by the client. If
omitted, any source port is acceptable. Specified as a comma-separate
list of port names, port numbers or port ranges.</li>
<br>
Examples<br>
    eth0<br>
    192.168.2.4,192.168.1.0/24<br>
</li>
<li>DEST -- Destination of the packet. Comma-separated list of
IP addresses and/or subnets.<br>
</li>
<li>PROTO - Protocol - Must be the name of a protocol from
/etc/protocol, a number or "all"<br>
</li>
<li>PORT(S) - Destination Ports. A comma-separated list of Port
names (from /etc/services), port numbers or port ranges (e.g., 21:22);
if the protocol is "icmp", this column is interpreted as the
destination icmp type(s).<br>
</li>
<li>CLIENT PORT(S) - (Optional) Port(s) used by the client. If
omitted, any source port is acceptable. Specified as a comma-separate
list of port names, port numbers or port ranges.</li>
</ul>
<p align="left">Example 1 - All packets arriving on eth1 should be marked
with 1. All packets arriving on eth2 and eth3 should be marked with 2.
All packets originating on the firewall itself should be marked with 3.</p>
with 1. All packets arriving on eth2 and eth3 should be marked with 2.
All packets originating on the firewall itself should be marked with 3.</p>
<table border="2" cellpadding="2" style="border-collapse: collapse;">
<tbody>
<tr>
<td><b>MARK</b></td>
<td><b>SOURCE</b></td>
<td><b>DEST</b></td>
<td><b>PROTO</b></td>
<td><b>PORT(S)</b></td>
<td><b>CLIENT PORT(S)</b></td>
</tr>
<tr>
<td>1</td>
<td>eth1</td>
<td>0.0.0.0/0</td>
<td>all</td>
<td> </td>
<td> </td>
</tr>
<tr>
<td>2</td>
<td>eth2</td>
<td>0.0.0.0/0</td>
<td>all</td>
<td> </td>
<td> </td>
</tr>
<tr>
<td valign="top">2<br>
</td>
<td valign="top">eth3<br>
</td>
<td valign="top">0.0.0.0/0<br>
</td>
<td valign="top">all<br>
</td>
<td valign="top"><br>
</td>
<td valign="top"><br>
</td>
</tr>
<tr>
<td>3</td>
<td>fw</td>
<td>0.0.0.0/0</td>
<td>all</td>
<td> </td>
<td> </td>
</tr>
</tbody>
<tbody>
<tr>
<td><b>MARK</b></td>
<td><b>SOURCE</b></td>
<td><b>DEST</b></td>
<td><b>PROTO</b></td>
<td><b>PORT(S)</b></td>
<td><b>CLIENT PORT(S)</b></td>
</tr>
<tr>
<td>1</td>
<td>eth1</td>
<td>0.0.0.0/0</td>
<td>all</td>
<td> </td>
<td> </td>
</tr>
<tr>
<td>2</td>
<td>eth2</td>
<td>0.0.0.0/0</td>
<td>all</td>
<td> </td>
<td> </td>
</tr>
<tr>
<td valign="top">2<br>
</td>
<td valign="top">eth3<br>
</td>
<td valign="top">0.0.0.0/0<br>
</td>
<td valign="top">all<br>
</td>
<td valign="top"><br>
</td>
<td valign="top"><br>
</td>
</tr>
<tr>
<td>3</td>
<td>fw</td>
<td>0.0.0.0/0</td>
<td>all</td>
<td> </td>
<td> </td>
</tr>
</tbody>
</table>
<p align="left">Example 2 - All GRE (protocol 47) packets not originating
on the firewall and destined for 155.186.235.151 should be marked with
12.</p>
on the firewall and destined for 155.186.235.151 should be marked with
12.</p>
<table border="2" cellpadding="2" style="border-collapse: collapse;">
<tbody>
<tr>
<td><b>MARK</b></td>
<td><b>SOURCE</b></td>
<td><b>DEST</b></td>
<td><b>PROTO</b></td>
<td><b>PORT(S)</b></td>
<td><b>CLIENT PORT(S)</b></td>
</tr>
<tr>
<td>12</td>
<td>0.0.0.0/0</td>
<td>155.186.235.151</td>
<td>47</td>
<td> </td>
<td> </td>
</tr>
</tbody>
<tbody>
<tr>
<td><b>MARK</b></td>
<td><b>SOURCE</b></td>
<td><b>DEST</b></td>
<td><b>PROTO</b></td>
<td><b>PORT(S)</b></td>
<td><b>CLIENT PORT(S)</b></td>
</tr>
<tr>
<td>12</td>
<td>0.0.0.0/0</td>
<td>155.186.235.151</td>
<td>47</td>
<td> </td>
<td> </td>
</tr>
</tbody>
</table>
<p align="left">Example 3 - All SSH packets originating in 192.168.1.0/24
and destined for 155.186.235.151 should be marked with 22.</p>
and destined for 155.186.235.151 should be marked with 22.</p>
<table border="2" cellpadding="2" style="border-collapse: collapse;">
<tbody>
<tr>
<td><b>MARK</b></td>
<td><b>SOURCE</b></td>
<td><b>DEST</b></td>
<td><b>PROTO</b></td>
<td><b>PORT(S)</b></td>
<td><b>CLIENT PORT(S)</b></td>
</tr>
<tr>
<td>22</td>
<td>192.168.1.0/24</td>
<td>155.186.235.151</td>
<td>tcp</td>
<td>22</td>
<td> </td>
</tr>
</tbody>
<tbody>
<tr>
<td><b>MARK</b></td>
<td><b>SOURCE</b></td>
<td><b>DEST</b></td>
<td><b>PROTO</b></td>
<td><b>PORT(S)</b></td>
<td><b>CLIENT PORT(S)</b></td>
</tr>
<tr>
<td>22</td>
<td>192.168.1.0/24</td>
<td>155.186.235.151</td>
<td>tcp</td>
<td>22</td>
<td> </td>
</tr>
</tbody>
</table>
<h3>My Setup<br>
</h3>
</h3>
<p>While I am currently using the HTB version of <a
href="http://lartc.org/wondershaper/">The Wonder Shaper</a> (I just copied
wshaper.htb to /etc/shorewall/tcstart and modified it as shown in the Wondershaper
README), I have also run with the following set of hand-crafted rules in
my tcstart file:<br>
</p>
<blockquote>
wshaper.htb to <b>/etc/shorewall/tcstart</b> and modified it as shown in
the Wondershaper README), I have also run with the following set of hand-crafted
rules in my <b>/etc/shorewall/tcstart</b> file:<br>
</p>
<blockquote>
<pre>run_tc qdisc add dev eth0 root handle 1: htb default 30<br><br>run_tc class add dev eth0 parent 1: classid 1:1 htb rate 384kbit burst 15k<br><br>echo "   Added Top Level Class -- rate 384kbit"</pre>
<pre>run_tc class add dev eth0 parent 1:1 classid 1:10 htb rate 140kbit ceil 384kbit burst 15k prio 1<br>run_tc class add dev eth0 parent 1:1 classid 1:20 htb rate 224kbit ceil 384kbit burst 15k prio 0<br>run_tc class add dev eth0 parent 1:1 classid 1:30 htb rate 20kbit  ceil 384kbit burst 15k quantum 1500 prio 1</pre>
<pre>echo "   Added Second Level Classes -- rates 140kbit, 224kbit, 20kbit"</pre>
<pre>run_tc qdisc add dev eth0 parent 1:10 pfifo limit 5<br>run_tc qdisc add dev eth0 parent 1:20 pfifo limit 10<br>run_tc qdisc add dev eth0 parent 1:30 pfifo limit 5</pre>
<pre>echo "   Enabled PFIFO on Second Level Classes"</pre>
<pre>run_tc filter add dev eth0 protocol ip parent 1:0 prio 1 handle 1 fw classid 1:10<br>run_tc filter add dev eth0 protocol ip parent 1:0 prio 0 handle 2 fw classid 1:20<br>run_tc filter add dev eth0 protocol ip parent 1:0 prio 1 handle 3 fw classid 1:30</pre>
<pre>echo "   Defined fwmark filters"<br></pre>
</blockquote>
</blockquote>
<p>My tcrules file that went with this tcstart file is shown in Example 1
above. You can look at my <a href="myfiles.htm">network configuration</a>
to get an idea of why I wanted these particular rules.<br>
</p>
above. You can look at my <a href="myfiles.htm">network configuration</a>
to get an idea of why I wanted these particular rules.<br>
</p>
<ol>
<li>I wanted to allow up to 140kbits/second for traffic outbound from
my DMZ (note that the ceiling is set to 384kbit so outbound DMZ traffic
<li>I wanted to allow up to 140kbits/second for traffic outbound from
my DMZ (note that the ceiling is set to 384kbit so outbound DMZ traffic
can use all available bandwidth if there is no traffic from the local systems
or from my laptop or firewall).</li>
<li>My laptop and local systems could use up to 224kbits/second.</li>
<li>My firewall could use up to 20kbits/second.<br>
</li>
or from my laptop or firewall).</li>
<li>My laptop and local systems could use up to 224kbits/second.</li>
<li>My firewall could use up to 20kbits/second.<br>
</li>
</ol>
<p><font size="2">Last Updated 12/31/2002 - <a href="support.htm">Tom Eastep</a></font></p>
<p><font size="2">Last Updated 12/20/2002 - <a href="support.htm">Tom Eastep</a></font></p>
<p><font face="Trebuchet MS"><a href="copyright.htm"><font size="2">Copyright</font>
© <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font><br>
</p>
© <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font><br>
</p>
<br>
<br>
</body>
</html>

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<h1 align="center"><font color="#ffffff">Shorewall Troubleshooting<img
src="images/obrasinf.gif" alt="Beating head on table" width="90"
height="90" align="middle">
</font></h1>
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<h3 align="left">Check the Errata</h3>
<p align="left">Check the <a href="errata.htm">Shorewall Errata</a> to be
sure that there isn't an update that you are missing for your version
<p align="left">Check the <a href="errata.htm">Shorewall Errata</a> to be
sure that there isn't an update that you are missing for your version
of the firewall.</p>
<h3 align="left">Check the FAQs</h3>
<p align="left">Check the <a href="FAQ.htm">FAQs</a> for solutions to common
<p align="left">Check the <a href="FAQ.htm">FAQs</a> for solutions to common
problems.</p>
<h3 align="left">If the firewall fails to start</h3>
If you receive an error message when starting or restarting the
firewall and you can't determine the cause, then do the following:
<ul>
<li>Make a note of the error message that you see.<br>
</li>
<li>shorewall debug start 2&gt; /tmp/trace</li>
<li>Look at the /tmp/trace file and see if that helps you
determine what the problem is. Be sure you find the place in the log where
the error message you saw is generated -- in 99.9% of the cases, it will
not be near the end of the log because after startup errors, Shorewall goes
through a "shorewall stop" phase which will also be traced.</li>
<li>If you still can't determine what's wrong then see the
<a href="support.htm">support page</a>.</li>
</ul>
Here's an example. During startup, a user sees the following:<br>
<blockquote>
<pre>Adding Common Rules<br>iptables: No chain/target/match by that name<br>Terminated<br></pre>
</blockquote>
A search through the trace for "No chain/target/match by that name" turned
up the following: 
<blockquote>
<pre>+ echo 'Adding Common Rules'<br>+ add_common_rules<br>+ run_iptables -A reject -p tcp -j REJECT --reject-with tcp-reset<br>++ echo -A reject -p tcp -j REJECT --reject-with tcp-reset<br>++ sed 's/!/! /g'<br>+ iptables -A reject -p tcp -j REJECT --reject-with tcp-reset<br>iptables: No chain/target/match by that name<br></pre>
</blockquote>
The command that failed was: "iptables -A reject -p tcp -j REJECT --reject-with
tcp-reset". In this case, the user had compiled his own kernel and had forgotten
to include REJECT target support (see <a href="kernel.htm">kernel.htm</a>)
<h3>Your network environment</h3>
<p>Many times when people have problems with Shorewall, the problem is
actually an ill-conceived network setup. Here are several popular snafus:
</p>
<ul>
<li>Port Forwarding where client and server are in the
same subnet. See <a href="FAQ.htm">FAQ 2.</a></li>
<li>Changing the IP address of a local system to be in the external
subnet, thinking that Shorewall will suddenly believe that the system
is in the 'net' zone.</li>
<li>Multiple interfaces connected to the same HUB or Switch. Given
the way that the Linux kernel respond to ARP "who-has" requests, this
type of setup does NOT work the way that you expect it to.</li>
</ul>
<h3 align="left">If you are having connection problems:</h3>
<p align="left">If the appropriate policy for the connection that you are
trying to make is ACCEPT, please DO NOT ADD ADDITIONAL ACCEPT RULES TRYING
TO MAKE IT WORK. Such additional rules will NEVER make it work, they add
clutter to your rule set and they represent a big security hole in the event
that you forget to remove them later.</p>
<p align="left">I also recommend against setting all of your policies to
ACCEPT in an effort to make something work. That robs you of one of
your best diagnostic tools - the "Shorewall" messages that Netfilter
will generate when you try to connect in a way that isn't permitted
by your rule set.</p>
<p align="left">Check your log ("/sbin/shorewall show log"). If you don't
see Shorewall messages, then your problem is probably NOT a Shorewall problem.
If you DO see packet messages, it may be an indication that you are missing
one or more rules -- see <a href="FAQ.htm#faq17">FAQ 17</a>.</p>
<p align="left">While you are troubleshooting, it is a good idea to clear
two variables in /etc/shorewall/shorewall.conf:</p>
<p align="left">LOGRATE=""<br>
LOGBURST=""</p>
<p align="left">This way, you will see all of the log messages being
generated (be sure to restart shorewall after clearing these variables).</p>
<p align="left">Example:</p>
<font face="Century Gothic, Arial, Helvetica">
<p align="left"><font face="Courier">Jun 27 15:37:56 gateway kernel:
Shorewall:all2all:REJECT:IN=eth2 OUT=eth1 SRC=192.168.2.2 DST=192.168.1.3
LEN=67 TOS=0x00 PREC=0x00 TTL=63 ID=5805 DF PROTO=UDP SPT=1803 DPT=53
LEN=47</font></p>
</font>
<p align="left">Let's look at the important parts of this message:</p>
<ul>
<li>all2all:REJECT - This packet was REJECTed out of the all2all
chain -- the packet was rejected under the "all"-&gt;"all" REJECT policy
(see <a href="FAQ.htm#faq17">FAQ 17).</a></li>
<li>IN=eth2 - the packet entered the firewall via eth2</li>
<li>OUT=eth1 - if accepted, the packet would be sent on eth1</li>
<li>SRC=192.168.2.2 - the packet was sent by 192.168.2.2</li>
<li>DST=192.168.1.3 - the packet is destined for 192.168.1.3</li>
<li>PROTO=UDP - UDP Protocol</li>
<li>DPT=53 - DNS</li>
</ul>
<p align="left">In this case, 192.168.2.2 was in the "dmz" zone and 192.168.1.3
is in the "loc" zone. I was missing the rule:</p>
<p align="left">ACCEPT    dmz    loc    udp    53<br>
</p>
If you receive an error message when starting or restarting
the firewall and you can't determine the cause, then do the following:
<p align="left">See <a href="FAQ.htm#faq17">FAQ 17</a> for additional information
about how to interpret the chain name appearing in a Shorewall log message.<br>
</p>
<h3 align="left">Other Gotchas</h3>
<ul>
<li>Seeing rejected/dropped packets logged out of the INPUT or
FORWARD chains? This means that:
<li>Make a note of the error message that you see.<br>
</li>
<li>shorewall debug start 2&gt; /tmp/trace</li>
<li>Look at the /tmp/trace file and see if that helps you
determine what the problem is. Be sure you find the place in the log
where the error message you saw is generated -- in 99.9% of the cases, it
will not be near the end of the log because after startup errors, Shorewall
goes through a "shorewall stop" phase which will also be traced.</li>
<li>If you still can't determine what's wrong then see the
<a href="support.htm">support page</a>.</li>
</ul>
Here's an example. During startup, a user sees the following:<br>
<blockquote>
<pre>Adding Common Rules<br>iptables: No chain/target/match by that name<br>Terminated<br></pre>
</blockquote>
A search through the trace for "No chain/target/match by that name" turned
up the following: 
<blockquote>
<pre>+ echo 'Adding Common Rules'<br>+ add_common_rules<br>+ run_iptables -A reject -p tcp -j REJECT --reject-with tcp-reset<br>++ echo -A reject -p tcp -j REJECT --reject-with tcp-reset<br>++ sed 's/!/! /g'<br>+ iptables -A reject -p tcp -j REJECT --reject-with tcp-reset<br>iptables: No chain/target/match by that name<br></pre>
</blockquote>
The command that failed was: "iptables -A reject -p tcp -j REJECT --reject-with
tcp-reset". In this case, the user had compiled his own kernel and had forgotten
to include REJECT target support (see <a href="kernel.htm">kernel.htm</a>)
<h3>Your network environment</h3>
<p>Many times when people have problems with Shorewall, the problem is
actually an ill-conceived network setup. Here are several popular snafus:
</p>
<ul>
<li>Port Forwarding where client and server are in
the same subnet. See <a href="FAQ.htm">FAQ 2.</a></li>
<li>Changing the IP address of a local system to be in the external
subnet, thinking that Shorewall will suddenly believe that the system
is in the 'net' zone.</li>
<li>Multiple interfaces connected to the same HUB or Switch.
Given the way that the Linux kernel respond to ARP "who-has" requests,
this type of setup does NOT work the way that you expect it to.</li>
</ul>
<h3 align="left">If you are having connection problems:</h3>
<p align="left">If the appropriate policy for the connection that you are
trying to make is ACCEPT, please DO NOT ADD ADDITIONAL ACCEPT RULES TRYING
TO MAKE IT WORK. Such additional rules will NEVER make it work, they
add clutter to your rule set and they represent a big security hole in
the event that you forget to remove them later.</p>
<p align="left">I also recommend against setting all of your policies to
ACCEPT in an effort to make something work. That robs you of one of
your best diagnostic tools - the "Shorewall" messages that Netfilter
will generate when you try to connect in a way that isn't permitted
by your rule set.</p>
<p align="left">Check your log ("/sbin/shorewall show log"). If you don't
see Shorewall messages, then your problem is probably NOT a Shorewall
problem. If you DO see packet messages, it may be an indication that you
are missing one or more rules -- see <a href="FAQ.htm#faq17">FAQ 17</a>.</p>
<p align="left">While you are troubleshooting, it is a good idea to clear
two variables in /etc/shorewall/shorewall.conf:</p>
<p align="left">LOGRATE=""<br>
LOGBURST=""</p>
<p align="left">This way, you will see all of the log messages being
generated (be sure to restart shorewall after clearing these variables).</p>
<p align="left">Example:</p>
<font face="Century Gothic, Arial, Helvetica">
<p align="left"><font face="Courier">Jun 27 15:37:56 gateway kernel:
Shorewall:all2all:REJECT:IN=eth2 OUT=eth1 SRC=192.168.2.2 DST=192.168.1.3
LEN=67 TOS=0x00 PREC=0x00 TTL=63 ID=5805 DF PROTO=UDP SPT=1803 DPT=53
LEN=47</font></p>
</font>
<p align="left">Let's look at the important parts of this message:</p>
<ul>
<li>all2all:REJECT - This packet was REJECTed out of the all2all
chain -- the packet was rejected under the "all"-&gt;"all" REJECT
policy (see <a href="FAQ.htm#faq17">FAQ 17).</a></li>
<li>IN=eth2 - the packet entered the firewall via eth2</li>
<li>OUT=eth1 - if accepted, the packet would be sent on eth1</li>
<li>SRC=192.168.2.2 - the packet was sent by 192.168.2.2</li>
<li>DST=192.168.1.3 - the packet is destined for 192.168.1.3</li>
<li>PROTO=UDP - UDP Protocol</li>
<li>DPT=53 - DNS</li>
</ul>
<p align="left">In this case, 192.168.2.2 was in the "dmz" zone and 192.168.1.3
is in the "loc" zone. I was missing the rule:</p>
<p align="left">ACCEPT    dmz    loc    udp    53<br>
</p>
<p align="left">See <a href="FAQ.htm#faq17">FAQ 17</a> for additional information
about how to interpret the chain name appearing in a Shorewall log message.<br>
</p>
<h3 align="left">'Ping' Problems?</h3>
Either can't ping when you think you should be able to or are able to ping
when you think that you shouldn't be allowed? Shorewall's 'Ping' Management<a
href="ping.html"> is described here</a>.<br>
<h3 align="left">Other Gotchas</h3>
<ul>
<li>Seeing rejected/dropped packets logged out of the INPUT or
FORWARD chains? This means that:
<ol>
<li>your zone definitions are screwed up and the host that is
sending the packets or the destination host isn't in any zone (using
an <a href="Documentation.htm#Hosts">/etc/shorewall/hosts</a> file
are you?); or</li>
<li>the source and destination hosts are both connected to the
same interface and that interface doesn't have the 'multi' option
specified in <a href="Documentation.htm#Interfaces">/etc/shorewall/interfaces</a>.</li>
<li>your zone definitions are screwed up and the host that
is sending the packets or the destination host isn't in any zone
(using an <a href="Documentation.htm#Hosts">/etc/shorewall/hosts</a>
file are you?); or</li>
<li>the source and destination hosts are both connected to
the same interface and that interface doesn't have the 'multi'
option specified in <a href="Documentation.htm#Interfaces">/etc/shorewall/interfaces</a>.</li>
</ol>
</li>
<li>Remember that Shorewall doesn't automatically allow ICMP
type 8 ("ping") requests to be sent between zones. If you want pings
to be allowed between zones, you need a rule of the form:<br>
<br>
    ACCEPT    &lt;source zone&gt;    &lt;destination zone&gt;   
icmp    echo-request<br>
<br>
The ramifications of this can be subtle. For example, if you
</li>
<li>Remember that Shorewall doesn't automatically allow ICMP
type 8 ("ping") requests to be sent between zones. If you want pings
to be allowed between zones, you need a rule of the form:<br>
<br>
    ACCEPT    &lt;source zone&gt;    &lt;destination zone&gt;   
icmp    echo-request<br>
<br>
The ramifications of this can be subtle. For example, if you
have the following in /etc/shorewall/nat:<br>
<br>
    10.1.1.2    eth0    130.252.100.18<br>
<br>
and you ping 130.252.100.18, unless you have allowed icmp type
8 between the zone containing the system you are pinging from and
the zone containing 10.1.1.2, the ping requests will be dropped. This
is true even if you have NOT specified 'noping' for eth0 in /etc/shorewall/interfaces.</li>
<li>If you specify "routefilter" for an interface, that interface
<br>
    10.1.1.2    eth0    130.252.100.18<br>
<br>
and you ping 130.252.100.18, unless you have allowed icmp type
8 between the zone containing the system you are pinging from and the
zone containing 10.1.1.2, the ping requests will be dropped. This is
true even if you have NOT specified 'noping' for eth0 in /etc/shorewall/interfaces.</li>
<li>If you specify "routefilter" for an interface, that interface
must be up prior to starting the firewall.</li>
<li>Is your routing correct? For example, internal systems usually
need to be configured with their default gateway set to the IP address
of their nearest firewall interface. One often overlooked aspect of
routing is that in order for two hosts to communicate, the routing between
them must be set up <u>in both directions.</u> So when setting up routing
between <b>A</b> and<b> B</b>, be sure to verify that the route from
<b>B</b> back to <b>A</b> is defined.</li>
<li>Some versions of LRP (EigerStein2Beta for example) have a
<li>Is your routing correct? For example, internal systems usually
need to be configured with their default gateway set to the IP address
of their nearest firewall interface. One often overlooked aspect
of routing is that in order for two hosts to communicate, the routing
between them must be set up <u>in both directions.</u> So when setting
up routing between <b>A</b> and<b> B</b>, be sure to verify that the
route from <b>B</b> back to <b>A</b> is defined.</li>
<li>Some versions of LRP (EigerStein2Beta for example) have a
shell with broken variable expansion. <a
href="ftp://ftp.shorewall.net/pub/shorewall/ash.gz"> You can get a corrected
href="ftp://ftp.shorewall.net/pub/shorewall/ash.gz"> You can get a corrected
shell from the Shorewall Errata download site.</a> </li>
<li>Do you have your kernel properly configured? <a
<li>Do you have your kernel properly configured? <a
href="kernel.htm">Click here to see my kernel configuration.</a> </li>
<li>Some features require the "ip" program. That program is
generally included in the "iproute" package which should be included
with your distribution (though many distributions don't install iproute
<li>Some features require the "ip" program. That program
is generally included in the "iproute" package which should be included
with your distribution (though many distributions don't install iproute
by default). You may also download the latest source tarball from <a
href="ftp://ftp.inr.ac.ru/ip-routing" target="_blank"> ftp://ftp.inr.ac.ru/ip-routing</a>
.</li>
<li>If you have <u>any</u> entry for a zone in /etc/shorewall/hosts
then the zone must be entirely defined in /etc/shorewall/hosts unless
you have specified MERGE_HOSTS=Yes (Shorewall version 1.3.5 and later).
For example, if a zone has two interfaces but only one interface has
an entry in /etc/shorewall/hosts then hosts attached to the other interface
href="ftp://ftp.inr.ac.ru/ip-routing" target="_blank"> ftp://ftp.inr.ac.ru/ip-routing</a>
.</li>
<li>If you have <u>any</u> entry for a zone in /etc/shorewall/hosts
then the zone must be entirely defined in /etc/shorewall/hosts unless
you have specified MERGE_HOSTS=Yes (Shorewall version 1.3.5 and later).
For example, if a zone has two interfaces but only one interface has an
entry in /etc/shorewall/hosts then hosts attached to the other interface
will <u>not</u> be considered part of the zone.</li>
<li>Problems with NAT? Be sure that you let Shorewall add all
<li>Problems with NAT? Be sure that you let Shorewall add all
external addresses to be use with NAT unless you have set <a
href="Documentation.htm#Aliases"> ADD_IP_ALIASES</a> =No in /etc/shorewall/shorewall.conf.</li>
</ul>
<h3>Still Having Problems?</h3>
<p>See the<a href="support.htm"> support page.</a></p>
<font face="Century Gothic, Arial, Helvetica">
<p>See the<a href="support.htm"> support page.<br>
</a></p>
<font face="Century Gothic, Arial, Helvetica">
<blockquote> </blockquote>
</font>
<p><font size="2">Last updated 12/4/2002 - Tom Eastep</font> </p>
<p><font face="Trebuchet MS"><a href="copyright.htm"><font size="2">Copyright</font>
</font>
<p><font size="2">Last updated 1/7/2003 - Tom Eastep</font> </p>
<p><font face="Trebuchet MS"><a href="copyright.htm"><font size="2">Copyright</font>
© <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font><br>
</p>
<br>
<br>
<br>
<br>
</p>
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