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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<title>Shoreline Firewall (Shorewall) 2.0</title>
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<h1><span style="font-weight: bold;"></span>Shorewall 2.x</h1>
<h3><a
href="http://lists.shorewall.net/pipermail/shorewall-users/2005-May/018444.html">NEWS:
Tom Eastep ends his involvement with Shorewall</a>.</h3>
<span style="font-weight: bold;">If you would like to help with future
Shorewall development, support and documentation then please subscribe
to the <a href="http://lists.shorewall.net/#Devel">Shorewall
Development mailing list</a> and introduce yourself. The future of
Shorewall is being actively discussed on that list.</span><br>
<p>
The information on this site applies only
to 2.x releases of Shorewall. For older versions:</p>
<ul>
<li>
<p style="margin-bottom: 0in;">The 1.4 site is <a
href="http://www.shorewall.net/1.4" target="_top">here.</a></p>
</li>
<li>
<p style="margin-bottom: 0in;">The 1.3 site is <a
href="http://www.shorewall.net/1.3" target="_top">here.</a> </p>
</li>
<li>
<p>The 1.2 site is <a href="http://shorewall.net/1.2/"
target="_top">here</a>. </p>
</li>
</ul>
<p>The current 2.2 Stable Release is 2.2.5 -- Here are the <a
href="http://shorewall.net/pub/shorewall/2.2/shorewall-2.2.5/releasenotes.txt">release
notes</a> and here are the <a
href="http://shorewall.net/pub/shorewall/2.2/shorewall-2.2.5/known_problems.txt">known
problems</a> and <a
href="http://shorewall.net/pub/shorewall/2.2/shorewall-2.2.5/errata/">updates</a>.<br>
</p>
<p>The current 2.3 Development Release is 2.4.0-RC1 -- Here are the <a
href="http://shorewall.net/pub/shorewall/2.4/shorewall-2.4.0-RC1/releasenotes.txt">release
notes</a> and here are the <a
href="http://shorewall.net/pub/shorewall/2.4/shorewall-2.4.0-RC1/known_problems.txt">known
problems</a> and <a
href="http://shorewall.net/pub/shorewall/2.4/shorewall-2.4.0-RC1/errata/">updates</a>.
</p>
<p><a
href="http://lists.shorewall.net/pipermail/shorewall-announce/2004-December/000451.html"><span
style="font-weight: bold;">End of
support life for Shorewall 1.4 -- Upgrading to Shorewall 2.2</span></a><br>
<br>
Copyright © 2001-2005 Thomas M. Eastep</p>
<p>Permission is granted to copy, distribute and/or modify this
document under the terms of the GNU Free Documentation License,
Version 1.2 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" target="_self">GNU
Free Documentation License</a>”.</p>
<p>2005-05-21</p>
<hr style="width: 100%; height: 2px;">
<h3>Table of Contents</h3>
<p style="margin-left: 0.42in; margin-bottom: 0in;"><a href="#Intro">Introduction
to Shorewall</a></p>
<p style="margin-left: 0.83in; margin-bottom: 0in;"><a href="#Glossary">Glossary</a><br>
<a href="#WhatIs">What
is Shorewall?</a><br>
<a href="#GettingStarted">Getting Started with
Shorewall</a><br>
<a href="#Info">Looking for Information?</a><br>
<a href="#Mandrake">Running
Shorewall on Mandrake® with a two-interface setup?</a><br>
<a href="#License">License</a><br>
</p>
<div style="margin-left: 40px;"><br>
<a href="#Leaf">Leaf</a><br>
<br>
<a href="#OpenWRT">OpenWRT</a><br>
</div>
<p style="margin-left: 40px;"><a href="#Donations">Donations</a></p>
<h2><a name="Intro"></a>Introduction to Shorewall</h2>
<h3><a name="Glossary"></a>Glossary</h3>
<ul>
<li>
<p style="margin-bottom: 0in;"><a href="http://www.netfilter.org/"
target="_top">Netfilter</a> - the packet filter facility built into
the 2.4 and later Linux kernels. </p>
</li>
<li>
<p style="margin-bottom: 0in;">ipchains - the packet filter
facility built into the 2.2 Linux kernels. Also the name of the utility
program used to configure and control that facility. Netfilter can be
used in ipchains compatibility mode. </p>
</li>
<li>
<p>iptables - the utility program used to configure and control
Netfilter. The term 'iptables' is often used to refer to the
combination of iptables+Netfilter (with Netfilter not in ipchains
compatibility mode). </p>
</li>
</ul>
<h3><a name="WhatIs"></a>What is Shorewall?</h3>
<p style="margin-left: 0.42in;">The Shoreline Firewall, more commonly
known as "Shorewall", is a high-level tool for configuring
Netfilter. You describe your firewall/gateway requirements using
entries in a set of configuration files. Shorewall reads those
configuration files and with the help of the iptables utility,
Shorewall configures Netfilter to match your requirements. Shorewall
can be used on a dedicated firewall system, a multi-function
gateway/router/server or on a standalone GNU/Linux system. Shorewall
does not use Netfilter's ipchains compatibility mode and can thus
take advantage of Netfilter's <a
href="http://www.cs.princeton.edu/%7Ejns/security/iptables/iptables_conntrack.html"
target="_top">connection
state tracking capabilities</a>.<br>
<br>
Shorewall is <u>not</u> a
daemon. Once Shorewall has configured Netfilter, it's job is
complete. After that, there is no Shorewall code running although the
<a href="starting_and_stopping_shorewall.htm">/sbin/shorewall program
can be used at any time to monitor the Netfilter firewall</a>.<br>
</p>
<p style="margin-left: 0.42in;">Shorewall is not the easiest to use of
the available iptables configuration tools but I believe that it is the
most flexible and powerful. So if you are looking for a simple
point-and-click set-and-forget Linux firewall solution that requires a
minimum of networking knowledge, I would encourage you to check out the
following alternatives:</p>
<ul style="margin-left: 40px;">
<li><a href="http://www.m0n0.ch/wall">http://www.m0n0.ch/wall</a></li>
<li><a href="http://www.fs-security.com/">http://www.fs-security.com/</a><br>
</li>
</ul>
<p style="margin-left: 0.42in;">On the other hand, if you are looking
for a Linux firewall solution that can handle complex and fast changing
network environments then Shorewall is a logical choice.<br>
</p>
<h3><a name="GettingStarted"></a>Getting Started with Shorewall</h3>
<p style="margin-left: 0.42in;">New to Shorewall? Start by selecting
the <a href="shorewall_quickstart_guide.htm">QuickStart Guide</a>
that most closely matches your environment and follow the step by
step instructions.</p>
<h3><a name="Info"></a>Looking for Information?</h3>
<p style="margin-left: 0.42in;">The <a href="Documentation_Index.html">Documentation
Index</a> is a good place to start as is the Site Search in the
frame above.<br>
</p>
<h3><a name="Mandrake"></a>Running Shorewall on Mandrake® with a
two-interface setup?</h3>
<p style="margin-left: 0.42in;">If so, the documentation on this site
will not apply directly to your setup. If you want to use the
documentation that you find here, you will want to consider
uninstalling what you have and installing a setup that matches the
documentation on this site. See the <a href="two-interface.htm">Two-interface
QuickStart Guide</a> for details.<br>
<br>
<b>Update: </b>I have been
informed by Mandrake Development that this problem has been corrected
in Mandrake 10.0 Final (the problem still exists in the 10.0
Community release).</p>
<h3><a name="License"></a>License</h3>
<p style="margin-left: 0.42in;">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.</p>
<p style="margin-left: 0.42in;">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 detail.</p>
<p style="margin-left: 0.42in;">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>
<p style="margin-left: 0.42in;">Permission is granted to copy,
distribute and/or modify this document under the terms of the GNU
Free Documentation License, Version 1.2 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 "GNU Free
Documentation License". </p>
<hr>
<h2><a name="Leaf"></a>Leaf</h2>
<p><a href="http://leaf.sourceforge.net/" target="_top"><font
color="#000000"><img src="images/leaflogo.gif" name="Graphic1"
alt="(Leaf Logo)" align="bottom" border="1" height="39" width="52"></font></a>
LEAF is an open source project which provides a Firewall/router on a
floppy, CD or CF. Several LEAF distributions including Bering and
Bering-uClibc use Shorewall as their Netfilter configuration tool.</p>
<hr style="width: 100%; height: 2px;">
<h2><a name="OpenWRT"></a>OpenWRT</h2>
<a href="http://openwrt.org"><img alt="(OpenWRT Logo)"
src="images/openwrt.png"
style="border: 0px solid ; width: 88px; height: 31px;" hspace="4"></a>OpenWRT
is a project which provides open source firmware for Linksys WRT54G
wireless routers. Two different Shorewall packages are available for
OpenWRT.<br>
<hr>
<h2><a name="Donations"></a>Donations</h2>
<p align="left"><a href="http://www.alz.org/" target="_top"><font
color="#000000"><img src="images/alz_logo2.gif" name="Graphic2"
alt="(Alzheimer's Association Logo)" align="right" border="1"
height="63" width="303"></font></a><a href="http://www.starlight.org/"
target="_top"><font color="#000000"><img src="images/newlog.gif"
name="Graphic3" alt="(Starlight Foundation Logo)" align="right"
border="1" height="105" width="62"></font></a><font size="4">Shorewall
is free but if you try it and find it useful, please consider making
a donation to the <a href="http://www.alz.org/" target="_top">Alzheimer's
Association</a> or to the <a href="http://www.starlight.org/"
target="_top">Starlight
Children's Foundation</a>.</font></p>
<p align="left"><font size="4">Thank You<br>
</font></p>
<p align="left"><br>
<br>
</p>
</body>
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