shorewall_code/web/shorewall_index.htm
2006-11-06 04:32:17 +00:00

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<h1>Shoreline Firewall (Shorewall)</h1>
<p>Copyright
© 2001-2006 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>2006-10-30</p>
<hr>
<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 Versions</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="#Proxmox">Proxmox
Firewall</a><br>
<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; 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 Versions</h3>
<p style="margin-left: 40px;">The <span style="font-weight: bold;">current
Stable Release</span> version
is&nbsp; 3.2.5<br>
</p>
<ul style="margin-left: 40px;">
<li>Here are the <a
href="http://www.shorewall.net/pub/shorewall/3.2/shorewall-3.2.5/releasenotes.txt">release
notes</a> <br>
</li>
<li>Here are the <a
href="http://www.shorewall.net/pub/shorewall/3.2/shorewall-3.2.5/known_problems.txt">known
problems</a> and <a
href="http://www.shorewall.net/pub/shorewall/3.2/shorewall-3.2.5/errata/">updates</a>.</li>
</ul>
<div style="margin-left: 40px;">The <span style="font-weight: bold;">previous
Stable Release</span> version is 3.0.9<br>
<ul>
<li>Here are the <a
href="http://www.shorewall.net/pub/shorewall/3.0/shorewall-3.0.9/releasenotes.txt">release
notes</a> <br>
</li>
<li>Here are the <a
href="http://www.shorewall.net/pub/shorewall/3.0/shorewall-3.0.9/known_problems.txt">known
problems</a> and <a
href="http://www.shorewall.net/pub/shorewall/3.0/shorewall-3.0.9/errata/">updates</a>.</li>
</ul>
The <span style="font-weight: bold;">current Development Release</span>
version
is 3.3.4<br>
</div>
<ul style="margin-left: 40px;">
<li>Here are the <a
href="http://www1.shorewall.net/pub/shorewall/development/3.3/shorewall-3.3.4/releasenotes.txt">release
notes</a> <br>
</li>
<li>Here are the <a
href="http://www.shorewall.net/pub/shorewall/development/3.3/shorewall-3.3.4/known_problems.txt">known
problems</a> and <a
href="http://www.shorewall.net/pub/shorewall/development/3.3/shorewall-3.3.4/errata/">updates</a>.</li>
</ul>
<div style="margin-left: 40px;">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="Proxmox"></a>Proxmox Firewall</h2>
<p><font color="#000000"><a href="http://www.proxmox.com/"><font
color="#000080"><img src="images/Proxmox.png" name="graphics2"
alt="Proxmox Logo" align="middle" border="1" height="20" hspace="4"
width="144"></font></a></font>Proxmox
firewall is based on Shorewall and Debian Sarge. It has an automated
installer and a GUI.</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>
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