mirror of
https://gitlab.com/shorewall/code.git
synced 2024-11-15 12:14:32 +01:00
e70a63f267
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@573 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
442 lines
20 KiB
HTML
442 lines
20 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||
<html>
|
||
<head>
|
||
|
||
<meta http-equiv="Content-Type"
|
||
content="text/html; charset=windows-1252">
|
||
<title>Upgrade Issues</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%">
|
||
|
||
<h1 align="center"><font color="#ffffff">Upgrade Issues</font></h1>
|
||
</td>
|
||
</tr>
|
||
|
||
</tbody>
|
||
</table>
|
||
|
||
<p>For upgrade instructions see the <a
|
||
href="Install.htm">Install/Upgrade page</a>.<br>
|
||
</p>
|
||
|
||
<p>It is important that you read all of the sections on this page where the
|
||
version number mentioned in the section title is later than what you
|
||
are currently running.<br>
|
||
</p>
|
||
|
||
<p> In the descriptions that follows, the term <b><i>group </i></b>refers
|
||
to a particular network or subnetwork (which may be 0.0.0.0/0 or it may
|
||
be a host address) accessed through a particular interface.<br>
|
||
</p>
|
||
|
||
<p>Examples:<br>
|
||
<br>
|
||
eth0:0.0.0.0/0<br>
|
||
eth2:192.168.1.0/24<br>
|
||
eth3:192.0.2.123<br>
|
||
</p>
|
||
|
||
<p> You can use the "shorewall check" command to see the groups associated
|
||
with each of your zones.<br>
|
||
</p>
|
||
|
||
<h3> </h3>
|
||
|
||
<h3>Version >= 1.4.4</h3>
|
||
If you are upgrading from 1.4.3 and have set the LOGMARKER variable in
|
||
<a href="Documentation.htm#Conf">/etc/shorewall/shorewall.conf</a>, then
|
||
you must set the new LOGFORMAT variable appropriately and remove your setting
|
||
of LOGMARKER<br>
|
||
<br>
|
||
<h3>Version 1.4.4<br>
|
||
</h3>
|
||
If you have zone names that are 5 characters long, you may experience problems
|
||
starting Shorewall because the --log-prefix in a logging rule is too long.
|
||
Upgrade to Version 1.4.4a to fix this problem..<br>
|
||
|
||
<h3>Version >= 1.4.2</h3>
|
||
There are some cases where you may want to handle traffic from a particular
|
||
group to itself. While I personally think that such a setups are ridiculous,
|
||
there are two cases covered in this documentation where it can occur:<br>
|
||
|
||
<ol>
|
||
<li><a href="FAQ.htm#faq2">In FAQ #2</a>.</li>
|
||
<li><a href="Shorewall_Squid_Usage.html">When running Squid as a transparent
|
||
proxy in your local zone.</a></li>
|
||
|
||
</ol>
|
||
If you have either of these cases, you will want to review the current
|
||
documentation and change your configuration accordingly.<br>
|
||
|
||
<h3>Version >= 1.4.1</h3>
|
||
|
||
<ul>
|
||
<li>Beginning with Version 1.4.1, traffic between groups in the
|
||
same zone is accepted by default. Previously, traffic from a zone to itself
|
||
was treated just like any other traffic; any matching rules were applied
|
||
followed by enforcement of the appropriate policy. With 1.4.1 and later
|
||
versions, unless you have explicit rules for traffic from Z to Z or you
|
||
have an explicit Z to Z policy (where "Z" is some zone) then traffic between
|
||
the groups in zone Z will be accepted. If you do have one or more explicit
|
||
rules for Z to Z or if you have an explicit Z to Z policy then the behavior
|
||
is as it was in prior versions.</li>
|
||
|
||
</ul>
|
||
|
||
<blockquote>
|
||
<ol>
|
||
<li>If you have a Z Z ACCEPT policy for a zone to allow traffic
|
||
between two interfaces to the same zone, that policy can be removed and
|
||
traffic between the interfaces will traverse fewer rules than previously.</li>
|
||
<li>If you have a Z Z DROP or Z Z REJECT policy or you have Z->Z
|
||
rules then your configuration should not require any change.</li>
|
||
<li>If you are currently relying on a implicit policy (one that
|
||
has "all" in either the SOURCE or DESTINATION column) to prevent traffic
|
||
between two interfaces to a zone Z and you have no rules for Z->Z then
|
||
you should add an explicit DROP or REJECT policy for Z to Z.<br>
|
||
</li>
|
||
|
||
</ol>
|
||
</blockquote>
|
||
|
||
<ul>
|
||
<li> Sometimes, you want two separate zones on one interface but
|
||
you don't want Shorewall to set up any infrastructure to handle traffic
|
||
between them. </li>
|
||
|
||
</ul>
|
||
|
||
<blockquote>Example:<br>
|
||
|
||
<blockquote>
|
||
<pre>/etc/shorewall/zones<br><br>z1 Zone1 The first Zone<br>z2 Zone2 The secont Zone<br><br>/etc/shorewall/interfaces<br><br>z2 eth1 192.168.1.255<br><br>/etc/shorewall/hosts<br><br>z1 eth1:192.168.1.3<br></pre>
|
||
</blockquote>
|
||
Here, zone z1 is nested in zone z2 and the firewall is not going to
|
||
be involved in any traffic between these two zones. Beginning with Shorewall
|
||
1.4.1, you can prevent Shorewall from setting up any infrastructure to handle
|
||
traffic between z1 and z2 by using the new NONE policy:<br>
|
||
|
||
<blockquote>
|
||
<pre>/etc/shorewall/policy<br><pre>z1 z2 NONE<br>z2 z1 NONE</pre></pre>
|
||
</blockquote>
|
||
Note that NONE policies are generally used in pairs unless there is
|
||
asymetric routing where only the traffic on one direction flows through
|
||
the firewall and you are using a NONE polciy in the other direction. </blockquote>
|
||
|
||
<h3>Version 1.4.1<br>
|
||
</h3>
|
||
|
||
<ul>
|
||
<li>In Version 1.4.1, Shorewall will never create rules to deal
|
||
with traffic from a given group back to itself. The <i>multi</i> interface
|
||
option is no longer available so if you want to route traffic between two
|
||
subnetworks on the same interface then I recommend that you upgrade to Version
|
||
1.4.2 and use the 'routeback' interface or host option. </li>
|
||
|
||
</ul>
|
||
|
||
<h3>Version >= 1.4.0</h3>
|
||
<b>IMPORTANT: Shorewall >=1.4.0 </b><b>requires</b> <b>the
|
||
iproute package ('ip' utility).</b><br>
|
||
<br>
|
||
<b>Note: </b>Unfortunately, some distributions call this package
|
||
iproute2 which will cause the upgrade of Shorewall to fail with the diagnostic:<br>
|
||
<br>
|
||
error: failed dependencies:iproute is needed by shorewall-1.4.0-1
|
||
<br>
|
||
<br>
|
||
This may be worked around by using the --nodeps option of rpm (rpm
|
||
-Uvh --nodeps <shorewall rpm>).<br>
|
||
<br>
|
||
If you are upgrading from a version < 1.4.0, then:<br>
|
||
|
||
<ul>
|
||
<li>The <b>noping </b>and <b>forwardping</b> interface options
|
||
are no longer supported nor is the <b>FORWARDPING </b>option in shorewall.conf.
|
||
ICMP echo-request (ping) packets are treated just like any other connection
|
||
request and are subject to rules and policies.</li>
|
||
<li>Interface names of the form <device>:<integer>
|
||
in /etc/shorewall/interfaces now generate a Shorewall error at startup
|
||
(they always have produced warnings in iptables).</li>
|
||
<li>The MERGE_HOSTS variable has been removed from shorewall.conf.
|
||
Shorewall 1.4 behaves like 1.3 did when MERGE_HOSTS=Yes; that is zone
|
||
contents are determined by BOTH the interfaces and hosts files when there
|
||
are entries for the zone in both files.</li>
|
||
<li>The <b>routestopped</b> option in the interfaces and
|
||
hosts file has been eliminated; use entries in the routestopped file
|
||
instead.</li>
|
||
<li>The Shorewall 1.2 syntax for DNAT and REDIRECT rules
|
||
is no longer accepted; you must convert to using the new syntax.</li>
|
||
<li value="6">The ALLOWRELATED variable in shorewall.conf
|
||
is no longer supported. Shorewall 1.4 behavior is the same as 1.3
|
||
with ALLOWRELATED=Yes.</li>
|
||
<li value="6">Late-arriving DNS replies are now dropped
|
||
by default; there is no need for your own /etc/shorewall/common file
|
||
simply to avoid logging these packets.</li>
|
||
<li value="6">The 'firewall', 'functions' and 'version'
|
||
file have been moved to /usr/share/shorewall.</li>
|
||
<li value="6">The icmp.def file has been removed. If you
|
||
include it from /etc/shorewall/icmpdef, you will need to modify that
|
||
file.</li>
|
||
|
||
<ul>
|
||
|
||
</ul>
|
||
<li>If you followed the advice in FAQ #2 and call find_interface_address
|
||
in /etc/shorewall/params, that code should be moved to /etc/shorewall/init.<br>
|
||
</li>
|
||
|
||
</ul>
|
||
|
||
<ul>
|
||
|
||
</ul>
|
||
|
||
<h3>Version 1.4.0</h3>
|
||
|
||
<ul>
|
||
<li value="8">The 'multi' interface option is no longer supported.
|
||
Shorewall will generate rules for sending packets back out the same
|
||
interface that they arrived on in two cases:</li>
|
||
|
||
</ul>
|
||
|
||
<blockquote>
|
||
<ul>
|
||
<li>There is an <u>explicit</u> policy for the source zone to
|
||
or from the destination zone. An explicit policy names both zones and
|
||
does not use the 'all' reserved word.</li>
|
||
|
||
</ul>
|
||
|
||
<ul>
|
||
<li>There are one or more rules for traffic for the source zone
|
||
to or from the destination zone including rules that use the 'all' reserved
|
||
word. Exception: if the source zone and destination zone are the same
|
||
then the rule must be explicit - it must name the zone in both the SOURCE
|
||
and DESTINATION columns.</li>
|
||
|
||
</ul>
|
||
</blockquote>
|
||
|
||
<h3>Version >= 1.3.14</h3>
|
||
<img src="images/BD21298_3.gif" alt="" width="13"
|
||
height="13">
|
||
Beginning in version 1.3.14, Shorewall treats entries
|
||
in <a href="Documentation.htm#Masq">/etc/shorewall/masq </a>differently.
|
||
The change involves entries with an <b>interface name</b> in the <b>SUBNET</b>
|
||
(second) <b>column</b>:<br>
|
||
|
||
<ul>
|
||
<li>Prior to 1.3.14, Shorewall would detect the FIRST
|
||
subnet on the interface (as shown by "ip addr show <i>interface</i>")
|
||
and would masquerade traffic from that subnet. Any other subnets that
|
||
routed through eth1 needed their own entry in /etc/shorewall/masq to
|
||
be masqueraded or to have SNAT applied.</li>
|
||
<li>Beginning with Shorewall 1.3.14, Shorewall uses the
|
||
firewall's routing table to determine ALL subnets routed through
|
||
the named interface. Traffic originating in ANY of those subnets
|
||
is masqueraded or has SNAT applied.</li>
|
||
|
||
</ul>
|
||
You will need to make a change to your configuration if:<br>
|
||
|
||
<ol>
|
||
<li>You have one or more entries in /etc/shorewall/masq
|
||
with an interface name in the SUBNET (second) column; and</li>
|
||
<li>That interface connects to more than one subnetwork.</li>
|
||
|
||
</ol>
|
||
Two examples:<br>
|
||
<br>
|
||
<b>Example 1</b> -- Suppose that your current config is
|
||
as follows:<br>
|
||
<br>
|
||
|
||
<pre> [root@gateway test]# cat /etc/shorewall/masq<br> #INTERFACE SUBNET ADDRESS<br> eth0 eth2 206.124.146.176<br> eth0 192.168.10.0/24 206.124.146.176<br> #LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE<br> [root@gateway test]# ip route show dev eth2<br> 192.168.1.0/24 scope link<br> 192.168.10.0/24 proto kernel scope link src 192.168.10.254<br> [root@gateway test]#</pre>
|
||
|
||
<blockquote>In this case, the second entry in /etc/shorewall/masq is no longer
|
||
required.<br>
|
||
</blockquote>
|
||
<b>Example 2</b>-- What if your current configuration is
|
||
like this?<br>
|
||
|
||
<pre> [root@gateway test]# cat /etc/shorewall/masq <br> #INTERFACE SUBNET ADDRESS <br> eth0 eth2 206.124.146.176<br> #LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE <br> [root@gateway test]# ip route show dev eth2 <br> 192.168.1.0/24 scope link<br> 192.168.10.0/24 proto kernel scope link src 192.168.10.254 <br> [root@gateway test]#</pre>
|
||
|
||
<blockquote>In this case, you would want to change the entry in /etc/shorewall/masq
|
||
to:<br>
|
||
</blockquote>
|
||
|
||
<pre> #INTERFACE SUBNET ADDRESS <br> eth0 192.168.1.0/24 206.124.146.176<br> #LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE</pre>
|
||
<img src="images/BD21298_3.gif" alt="" width="13"
|
||
height="13">
|
||
Version 1.3.14 also introduced simplified ICMP echo-request
|
||
(ping) handling. The option OLD_PING_HANDLING=Yes in /etc/shorewall/shorewall.conf
|
||
is used to specify that the old (pre-1.3.14) ping handling is to
|
||
be used (If the option is not set in your /etc/shorewall/shorewall.conf
|
||
then OLD_PING_HANDLING=Yes is assumed). I don't plan on supporting
|
||
the old handling indefinitely so I urge current users to migrate to using
|
||
the new handling as soon as possible. See the <a href="ping.html">'Ping'
|
||
handling documentation</a> for details.<br>
|
||
|
||
<h3>Version 1.3.10</h3>
|
||
If you have installed the 1.3.10 Beta 1 RPM and are now
|
||
upgrading to version 1.3.10, you will need to use the '--force' option:<br>
|
||
<br>
|
||
|
||
<blockquote>
|
||
<pre>rpm -Uvh --force shorewall-1.3.10-1.noarch.rpm </pre>
|
||
</blockquote>
|
||
|
||
<h3>Version >= 1.3.9</h3>
|
||
The 'functions' file has moved to /usr/lib/shorewall/functions.
|
||
If you have an application that uses functions from that file, your
|
||
application will need to be changed to reflect this change of location.<br>
|
||
|
||
<h3>Version >= 1.3.8</h3>
|
||
|
||
<p>If you have a pair of firewall systems configured for failover
|
||
or if you have asymmetric routing, you will need to modify
|
||
your firewall setup slightly under Shorewall
|
||
versions >= 1.3.8. Beginning with version 1.3.8,
|
||
you must set NEWNOTSYN=Yes in your
|
||
/etc/shorewall/shorewall.conf file.</p>
|
||
|
||
<h3>Version >= 1.3.7</h3>
|
||
|
||
<p>Users specifying ALLOWRELATED=No in /etc/shorewall.conf
|
||
will need to include the following
|
||
rules in their /etc/shorewall/icmpdef file (creating this
|
||
file if necessary):</p>
|
||
|
||
<pre> run_iptables -A icmpdef -p ICMP --icmp-type echo-reply -j ACCEPT<br> run_iptables -A icmpdef -p ICMP --icmp-type source-quench -j ACCEPT<br> run_iptables -A icmpdef -p ICMP --icmp-type destination-unreachable -j ACCEPT<br> run_iptables -A icmpdef -p ICMP --icmp-type time-exceeded -j ACCEPT<br> run_iptables -A icmpdef -p ICMP --icmp-type parameter-problem -j ACCEPT</pre>
|
||
|
||
<p>Users having an /etc/shorewall/icmpdef file may remove the ". /etc/shorewall/icmp.def"
|
||
command from that file since the icmp.def file is now empty.</p>
|
||
|
||
<h3><b><a name="Bering">Upgrading </a>Bering to Shorewall >= 1.3.3</b></h3>
|
||
|
||
<p>To properly upgrade with Shorewall version 1.3.3 and later:</p>
|
||
|
||
<ol>
|
||
<li>Be sure you have
|
||
a backup -- you will need to transcribe
|
||
any Shorewall configuration changes
|
||
that you have made to the new configuration.</li>
|
||
<li>Replace the shorwall.lrp
|
||
package provided on the Bering
|
||
floppy with the later one. If you did
|
||
not obtain the later version from Jacques's site, see additional
|
||
instructions below.</li>
|
||
<li>Edit the /var/lib/lrpkg/root.exclude.list
|
||
file and remove the /var/lib/shorewall
|
||
entry if present. Then do not
|
||
forget to backup root.lrp !</li>
|
||
|
||
</ol>
|
||
|
||
<p>The .lrp that I release isn't set up for a two-interface firewall like
|
||
Jacques's. You need to follow the <a
|
||
href="two-interface.htm">instructions for setting up a two-interface
|
||
firewall</a> plus you also need to add the following two Bering-specific
|
||
rules to /etc/shorewall/rules:</p>
|
||
|
||
<blockquote>
|
||
<pre># Bering specific rules:<br># allow loc to fw udp/53 for dnscache to work<br># allow loc to fw tcp/80 for weblet to work<br>#<br>ACCEPT loc fw udp 53<br>ACCEPT loc fw tcp 80</pre>
|
||
</blockquote>
|
||
|
||
<h3 align="left">Version 1.3.6 and 1.3.7</h3>
|
||
|
||
<p align="left">If you have a pair of firewall systems configured for
|
||
failover or if you have asymmetric routing, you will need to modify
|
||
your firewall setup slightly under Shorewall versions 1.3.6
|
||
and 1.3.7</p>
|
||
|
||
<ol>
|
||
<li>
|
||
<p align="left">Create the file /etc/shorewall/newnotsyn and in it add
|
||
the following rule<br>
|
||
<br>
|
||
<font face="Courier">run_iptables -A newnotsyn
|
||
-j RETURN # So that the connection tracking table can
|
||
be rebuilt<br>
|
||
# from
|
||
non-SYN packets after takeover.<br>
|
||
</font> </p>
|
||
</li>
|
||
<li>
|
||
<p align="left">Create /etc/shorewall/common (if you don't already
|
||
have that file) and include the following:<br>
|
||
<br>
|
||
<font face="Courier">run_iptables -A common
|
||
-p tcp --tcp-flags ACK,FIN,RST ACK -j ACCEPT #Accept
|
||
Acks to rebuild connection<br>
|
||
|
||
#tracking table. <br>
|
||
. /etc/shorewall/common.def</font> </p>
|
||
</li>
|
||
|
||
</ol>
|
||
|
||
<h3 align="left">Versions >= 1.3.5</h3>
|
||
|
||
<p align="left">Some forms of pre-1.3.0 rules file syntax are no longer
|
||
supported. </p>
|
||
|
||
<p align="left">Example 1:</p>
|
||
|
||
<div align="left">
|
||
<pre> ACCEPT net loc:192.168.1.12:22 tcp 11111 - all</pre>
|
||
</div>
|
||
|
||
<p align="left">Must be replaced with:</p>
|
||
|
||
<div align="left">
|
||
<pre> DNAT net loc:192.168.1.12:22 tcp 11111</pre>
|
||
</div>
|
||
|
||
<div align="left">
|
||
<p align="left">Example 2:</p>
|
||
</div>
|
||
|
||
<div align="left">
|
||
<pre> ACCEPT loc fw::3128 tcp 80 - all</pre>
|
||
</div>
|
||
|
||
<div align="left">
|
||
<p align="left">Must be replaced with:</p>
|
||
</div>
|
||
|
||
<div align="left">
|
||
<pre> REDIRECT loc 3128 tcp 80</pre>
|
||
</div>
|
||
|
||
<h3 align="left">Version >= 1.3.2</h3>
|
||
|
||
<p align="left">The functions and versions files together with the 'firewall'
|
||
symbolic link have moved from /etc/shorewall to /var/lib/shorewall.
|
||
If you have applications that access these files, those applications
|
||
should be modified accordingly.</p>
|
||
|
||
<p><font size="2"> Last updated 5/27/2003 - <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, 2003 Thomas M. Eastep.</font></a></font><br>
|
||
</p>
|
||
</body>
|
||
</html>
|