forked from extern/shorewall_code
ed61406441
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@440 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
456 lines
28 KiB
HTML
456 lines
28 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<meta http-equiv="Content-Type"
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content="text/html; charset=windows-1252">
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<title>Shoreline Firewall (Shorewall) 1.3</title>
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<base target="_self">
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</head>
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<body>
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<table border="0" cellpadding="0" cellspacing="4"
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style="border-collapse: collapse;" width="100%" id="AutoNumber3"
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bgcolor="#4b017c">
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<tbody>
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<tr>
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<td width="100%" height="90">
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<h1 align="center"> <font size="4"><i> <a
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href="http://www.cityofshoreline.com"> <img vspace="4" hspace="4"
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alt="Shorwall Logo" height="70" width="85" align="left"
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src="images/washington.jpg" border="0">
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</a></i></font><font color="#ffffff">Shorewall
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1.3 - <font size="4">"<i>iptables
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made easy"</i></font></font><a href="http://www.sf.net">
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</a></h1>
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<div align="center"><a href="/1.2/index.html" target="_top"><font
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color="#ffffff">Shorewall 1.2 Site here</font></a></div>
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</td>
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</tr>
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</tbody>
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</table>
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<div align="center">
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<center>
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<table border="0" cellpadding="0" cellspacing="0"
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style="border-collapse: collapse;" width="100%" id="AutoNumber4">
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<tbody>
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<tr>
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<td width="90%">
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<h2 align="left">What is it?</h2>
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<p>The Shoreline Firewall, more commonly known as<61> "Shorewall", is
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a <a href="http://www.netfilter.org">Netfilter</a> (iptables) based
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firewall that can be used on a dedicated firewall system, a multi-function
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gateway/router/server or on a standalone GNU/Linux system.</p>
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<p>This program is free software; you can redistribute it and/or modify
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it under the terms of
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<a href="http://www.gnu.org/licenses/gpl.html">Version 2 of
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the GNU General Public License</a> as published by the Free Software
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Foundation.<br>
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<br>
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This program is distributed
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in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty
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of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the GNU General Public License
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for more details.<br>
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<br>
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You should have received a copy
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of the GNU General Public License
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along with this program; if not, write to the Free
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Software Foundation, Inc., 675 Mass Ave, Cambridge,
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MA 02139, USA</p>
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<p><a href="copyright.htm">Copyright 2001, 2002, 2003 Thomas M. Eastep</a></p>
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<p> <a href="http://leaf.sourceforge.net" target="_top"><img
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border="0" src="images/leaflogo.gif" width="49" height="36">
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</a>Jacques Nilo and Eric
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Wolzak have a LEAF (router/firewall/gateway on
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a floppy, CD or compact flash) distribution called
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<i>Bering</i> that features Shorewall-1.3.10
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and Kernel-2.4.18. You can find their work at:
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<a href="http://leaf.sourceforge.net/devel/jnilo"> http://leaf.sourceforge.net/devel/jnilo</a></p>
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<b>Congratulations to Jacques and
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Eric on the recent release of Bering 1.0 Final!!! <br>
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</b>
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<h2>News</h2>
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<p><b>2/8/2003 - Shoreawll 1.3.14</b><b> </b><b><img
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border="0" src="images/new10.gif" width="28" height="12" alt="(New)">
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</b></p>
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<p>New features include</p>
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<ol>
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<li>An OLD_PING_HANDLING option has been added to shorewall.conf.
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When set to Yes, Shorewall ping handling is as it has always been (see
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http://www.shorewall.net/ping.html).<br>
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<br>
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When OLD_PING_HANDLING=No, icmp echo (ping) is handled via rules and
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policies just like any other connection request. The FORWARDPING=Yes option
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in shorewall.conf and the 'noping' and 'filterping' options in /etc/shorewall/interfaces
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will all generate an error.<br>
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<br>
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</li>
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<li>It is now possible to direct Shorewall to create a "label" such
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as<61> "eth0:0" for IP addresses that it creates under ADD_IP_ALIASES=Yes
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and ADD_SNAT_ALIASES=Yes. This is done by specifying the label instead
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of just the interface name:<br>
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<20><br>
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<20><> a) In the INTERFACE column of /etc/shorewall/masq<br>
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<20><> b) In the INTERFACE column of /etc/shorewall/nat<br>
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<20></li>
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<li>Support for OpenVPN Tunnels.<br>
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<br>
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</li>
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<li>Support for VLAN devices with names of the form $DEV.$VID (e.g.,
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eth0.0)<br>
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<br>
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</li>
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<li>When an interface name is entered in the SUBNET column of the
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/etc/shorewall/masq file, Shorewall previously masqueraded traffic from
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only the first subnet defined on that interface. It did not masquerade
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traffic from:<br>
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<20><br>
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<20><> a) The subnets associated with other addresses on the interface.<br>
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<20><> b) Subnets accessed through local routers.<br>
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<20><br>
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Beginning with Shorewall 1.3.14, if you enter an interface name in the
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SUBNET column, shorewall will use the firewall's routing table to construct
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the masquerading/SNAT rules.<br>
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<20><br>
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Example 1 -- This is how it works in 1.3.14.<br>
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<20><> <br>
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<pre><EFBFBD><EFBFBD> [root@gateway test]# cat /etc/shorewall/masq<br> #INTERFACE<43><45><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> SUBNET<45><54><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> ADDRESS<br> eth0<68><30><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> eth2<68><32><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 206.124.146.176<br> #LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE</pre>
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<pre><EFBFBD> [root@gateway test]# ip route show dev eth2<br> 192.168.1.0/24<32> scope link<br> 192.168.10.0/24<32> proto kernel<65> scope link<6E> src 192.168.10.254<br></pre>
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<pre><EFBFBD> [root@gateway test]# shorewall start<br> ...<br> Masqueraded Subnets and Hosts:<br> To 0.0.0.0/0 from 192.168.1.0/24 through eth0 using 206.124.146.176<br> To 0.0.0.0/0 from 192.168.10.0/24 through eth0 using 206.124.146.176<br> Processing /etc/shorewall/tos...</pre>
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<20><br>
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When upgrading to Shorewall 1.3.14, if you have multiple local subnets
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connected to an interface that is specified in the SUBNET column of an /etc/shorewall/masq
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entry, your /etc/shorewall/masq file will need changing. In most cases,
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you will simply be able to remove redundant entries. In some cases though,
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you might want to change from using the interface name to listing specific
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subnetworks if the change described above will cause masquerading to occur
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on subnetworks that you don't wish to masquerade.<br>
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<20><br>
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Example 2 -- Suppose that your current config is as follows:<br>
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<20><> <br>
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<pre><EFBFBD><EFBFBD> [root@gateway test]# cat /etc/shorewall/masq<br> #INTERFACE<43><45><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> SUBNET<45><54><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> ADDRESS<br> eth0<68><30><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> eth2<68><32><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 206.124.146.176<br> eth0<68><30><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 192.168.10.0/24<32><34><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 206.124.146.176<br> #LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE</pre>
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<pre><EFBFBD><EFBFBD> [root@gateway test]# ip route show dev eth2<br> 192.168.1.0/24<32> scope link<br> 192.168.10.0/24<32> proto kernel<65> scope link<6E> src 192.168.10.254<br> [root@gateway test]#</pre>
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<20><br>
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<20><> In this case, the second entry in /etc/shorewall/masq is no longer
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required.<br>
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<20><br>
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Example 3 -- What if your current configuration is like this?<br>
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<20><br>
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<pre><EFBFBD><EFBFBD> [root@gateway test]# cat /etc/shorewall/masq<br> #INTERFACE<43><45><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> SUBNET<45><54><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> ADDRESS<br> eth0<68><30><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> eth2<68><32><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 206.124.146.176<br> #LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE</pre>
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<pre><EFBFBD><EFBFBD> [root@gateway test]# ip route show dev eth2<br> 192.168.1.0/24<32> scope link<br> 192.168.10.0/24<32> proto kernel<65> scope link<6E> src 192.168.10.254<br> [root@gateway test]#</pre>
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<20><br>
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<20><> In this case, you would want to change the entry in<69> /etc/shorewall/masq
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to:<br>
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<pre><EFBFBD><EFBFBD> #INTERFACE<43><45><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> SUBNET<45><54><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> ADDRESS<br> eth0<68><30><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 192.168.1.0/24<32><34><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 206.124.146.176<br> #LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE</pre>
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</li>
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</ol>
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<p><b>2/5/2003 - Shorewall Support included in Webmin 1.06</b><b>0
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</b><b><img border="0" src="images/new10.gif" width="28"
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height="12" alt="(New)">
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</b></p>
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Webmin version 1.060 now has Shorewall support included as standard.
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See <a href="http://www.webmin.com">http://www.webmin.com</a> <b>
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</b>
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<p><b></b></p>
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<ul>
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</ul>
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<p><a href="News.htm">More News</a></p>
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<h2> </h2>
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<h1 align="center"><a href="http://www.sf.net"><img align="left"
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alt="SourceForge Logo"
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src="http://sourceforge.net/sflogo.php?group_id=22587&type=3">
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</a></h1>
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<h4> </h4>
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<h2>This site is hosted by the generous folks at <a
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href="http://www.sf.net">SourceForge.net</a> </h2>
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<h2><a name="Donations"></a>Donations</h2>
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</td>
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<td width="88"
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bgcolor="#4b017c" valign="top" align="center"> <br>
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</td>
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</tr>
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</tbody>
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</table>
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</center>
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</div>
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<table border="0" cellpadding="5" cellspacing="0"
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style="border-collapse: collapse;" width="100%" id="AutoNumber2"
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bgcolor="#4b017c">
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<tbody>
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<tr>
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<td width="100%"
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style="margin-top: 1px;">
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<p align="center"><a href="http://www.starlight.org"> <img
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border="4" src="images/newlog.gif" width="57" height="100" align="left"
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hspace="10">
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</a></p>
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<p align="center"><font size="4" color="#ffffff">Shorewall is free but
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if you try it and find it useful, please consider making a donation
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to <a
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href="http://www.starlight.org"><font color="#ffffff">Starlight Children's
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Foundation.</font></a> Thanks!</font></p>
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</td>
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</tr>
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</tbody>
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</table>
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<p><font size="2">Updated 2/7/2003 - <a href="support.htm">Tom Eastep</a></font>
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<br>
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</p>
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</body>
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</html>
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