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<title>Shoreline Firewall (Shorewall) 3.*</title>
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<h1>Shoreline Firewall (Shorewall)</h1>
<p>Copyright © 2001-2007 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>2007-07-10</p>
<hr style="width: 100%; height: 2px;">
<h2>Table of Contents</h2>
<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="#Releases">Current Shorewall Releases</a><br>
<a href="#GettingStarted">Getting Started with Shorewall</a><br>
<a href="#Info">Looking for Information?</a><br>
<a href="#License">License</a></p>
<p style="margin-left: 0.42in;"><br>
<a href="#Leaf">Leaf</a><br>
<a href="#OpenWRT">OpenWRT</a><br>
<a href="#Donations">Donations</a></p>
<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; as a consequence, Shorewall can
take advantage of Netfilter's connection state tracking capabilities to
create a stateful firewall.<br>
<br>
Shorewall is <u>not</u> a daemon. Once Shorewall has configured Netfilter,
it's job is complete and there is no Shorewall code left running in the
system. The <a href="starting_and_stopping_shorewall.htm">/sbin/shorewall
program can be used at any time to monitor the Netfilter firewall</a>.</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>
<li><p style="margin-bottom: 0in;"><a
href="http://www.m0n0.ch/wall">m0n0wall</a> (FreeBSD Based) </p>
</li>
<li><p><a href="http://www.fs-security.com/">Firestarter</a></p>
</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.</p>
<p style="margin-left: 0.42in;">To see some of the many things that you can
do with Shorewall, see the <a href="shorewall_features.htm">Shorewall
Features page</a>.<br>
</p>
<h3><a name="Releases"></a>Current Shorewall Releases</h3>
<p style="margin-left: 40px;">The <span style="font-weight: bold;">current
Stable Release</span> version is  3.4.4<br>
</p>
<ul style="margin-left: 40px;">
<li>Here are the <a
href="http://www1.shorewall.net/pub/shorewall/3.4/shorewall-3.4.4/releasenotes.txt">release
notes</a> <br>
</li>
<li>Here are the <a
href="http://www1.shorewall.net/pub/shorewall/3.4/shorewall-3.4.4/known_problems.txt">known
problems</a> and <a
href="http://www1.shorewall.net/pub/shorewall/3.4/shorewall-3.4.4/errata/">updates</a>.</li>
</ul>
<div style="margin-left: 40px;">
The <span style="font-weight: bold;">previous Stable Release</span> version
is 3.2.10<br>
<ul>
<li>Here are the <a
href="http://www1.shorewall.net/pub/shorewall/3.2/shorewall-3.2.10/releasenotes.txt">release
notes</a> <br>
</li>
<li>Here are the <a
href="http://www1.shorewall.net/pub/shorewall/3.2/shorewall-3.2.10/known_problems.txt">known
problems</a> and <a
href="http://www1.shorewall.net/pub/shorewall/3.2/shorewall-3.2.10/errata/">updates</a>.</li>
</ul>
The <span style="font-weight: bold;">current Development Release</span> is
4.0.0 RC2
<ul>
<li>Here are the <a
href="http://www1.shorewall.net/pub/shorewall/development/4.0/shorewall-4.0.0-RC2/releasenotes.txt">release
notes</a> <br>
</li>
<li>Here are the <a
href="http://www1.shorewall.net/pub/shorewall/development/4.0/shorewall-4.0.0-RC2/known_problems.txt">known
problems</a> and <a
href="http://www1.shorewall.net/pub/shorewall/development/4.0/shorewall-4.0.0-RC2/errata/">updates</a>.</li>
</ul>
<div style="margin-left: 40px;">
Read about the <a href="4.0/Shorewall-4.html">New Development Release
here</a>.<br>
</div>
</div>
<div style="margin-left: 40px;">
<br>
Get them from the <a href="download.htm">download sites</a></div>
<h3><a name="GettingStarted"></a>Getting Started with Shorewall</h3>
<p style="margin-left: 0.42in;">New to Shorewall? Download the current Stable
version (see above) then select 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.html">Documentation Index</a> is a good place to start as
is the Site Search in the frame above.</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><font color="#000080"><a href="http://leaf.sourceforge.net/"
target="_top"><font color="#000080"><img src="images/leaflogo.gif"
name="Graphic1" alt="(Leaf Logo)" align="bottom" border="1" height="39"
width="52" /></font></a></font> 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>
<h2><a name="OpenWRT"></a>OpenWRT</h2>
<p style="margin-bottom: 0in;"><font color="#000000"><a
href="http://openwrt.org/"><font color="#000080"><img
src="images/openwrt.png" name="graphics1" alt="(OpenWRT Logo)" align="bottom"
border="1" height="34" hspace="4" width="91" /></font></a></font>OpenWRT is a
project which provides open source firmware for Linksys WRT54G wireless
routers. Two different Shorewall packages are available for OpenWRT.</p>
<hr>
<h2><a name="Donations"></a>Donations</h2>
<p><a href="http://www.alz.org/" target="_top"><font color="#000080"><img
src="images/alz_logo2.gif" name="Graphic2"
alt="(Alzheimer's Association Logo)" align="right" border="1" height="66"
width="306" /></font></a><a href="http://www.starlight.org/"
target="_top"><font color="#000080"><img src="images/newlog.gif"
name="Graphic3" alt="(Starlight Foundation Logo)" align="right" border="1"
height="108" width="65" /></font></a>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>. <br>
<br>
Thank You</p>
<p align="left"><br>
<br>
</p>
</body>
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