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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
"http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd">
<article id="shorewall_features">
<!--$Id$-->
<articleinfo>
<title>Shorewall Features</title>
<author>
<firstname>Tom</firstname>
<surname>Eastep</surname>
</author>
<pubdate><?dbtimestamp format="Y/m/d"?></pubdate>
<copyright>
<year>2001-2009</year>
<holder>Thomas M Eastep</holder>
</copyright>
<legalnotice>
<para>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
<quote><ulink url="GnuCopyright.htm">GNU Free Documentation
License</ulink></quote>.</para>
</legalnotice>
</articleinfo>
<caution>
<para><emphasis role="bold">This article applies to Shorewall 4.3 and
later. If you are running a version of Shorewall earlier than Shorewall
4.3.5 then please see the documentation for that
release.</emphasis></para>
</caution>
<section id="Features">
<title>Features</title>
<itemizedlist>
<listitem>
<para>Uses Netfilter's connection tracking facilities for stateful
packet filtering.</para>
</listitem>
<listitem>
<para>Can be used in<emphasis role="bold"> a wide range of
router/firewall/gateway applications</emphasis> .</para>
<itemizedlist>
<listitem>
<para>Completely customizable using configuration files.</para>
</listitem>
<listitem>
<para>No limit on the number of network interfaces.</para>
</listitem>
<listitem>
<para>Allows you to partition the network into <ulink
url="manpages/shorewall-zones.html">zones</ulink> and gives you
complete control over the connections permitted between each pair
of zones.</para>
</listitem>
<listitem>
<para>Multiple interfaces per zone and multiple zones per
interface permitted.</para>
</listitem>
<listitem>
<para>Supports nested and overlapping zones.</para>
</listitem>
</itemizedlist>
</listitem>
<listitem>
<para>Supports <emphasis role="bold">centralized firewall
administration</emphasis>.</para>
<itemizedlist>
<listitem>
<para>Shorewall installed on a single administrative system. May
be a <trademark>Windows</trademark> PC running
<trademark>Cygwin</trademark>.</para>
</listitem>
<listitem>
<para>Centrally generated firewall scripts run on the firewalls
under control of <ulink
url="CompiledPrograms.html#Lite">Shorewall-lite</ulink>.</para>
</listitem>
</itemizedlist>
</listitem>
<listitem>
<para><ulink url="shorewall_quickstart_guide.htm">QuickStart Guides
(HOWTOs)</ulink> to help get your first firewall up and running
quickly</para>
</listitem>
<listitem>
<para>A <emphasis role="bold">GUI</emphasis> is available via Webmin
1.060 and later (<ulink
url="http://www.webmin.com">http://www.webmin.com</ulink>)</para>
</listitem>
<listitem>
<para>Extensive <emphasis role="bold"><ulink
url="Documentation_Index.html">documentation</ulink></emphasis> is
available in both Docbook XML and HTML formats.</para>
</listitem>
<listitem>
<para><emphasis role="bold">Flexible address management/routing
support</emphasis> (and you can use all types in the same
firewall):</para>
<itemizedlist>
<listitem>
<para><ulink
url="manpages/shorewall-masq.html">Masquerading/SNAT</ulink>.</para>
</listitem>
<listitem>
<para><ulink url="FAQ.htm#faq1">Port Forwarding
(DNAT)</ulink>.</para>
</listitem>
<listitem>
<para><ulink url="NAT.htm">One-to-one NAT</ulink>.</para>
</listitem>
<listitem>
<para><ulink url="ProxyARP.htm">Proxy ARP</ulink>.</para>
</listitem>
<listitem>
<para><ulink url="netmap.html">NETMAP</ulink> (requires a 2.6
kernel or a patched 2.4 kernel).</para>
</listitem>
<listitem>
<para><ulink url="Shorewall_and_Routing.html">Multiple ISP
support</ulink></para>
</listitem>
</itemizedlist>
</listitem>
<listitem>
<para><ulink role="bold" url="blacklisting_support.htm"><emphasis
role="bold">Blacklisting</emphasis></ulink> of individual IP addresses
and subnetworks is supported.</para>
</listitem>
<listitem>
<para><ulink url="starting_and_stopping_shorewall.htm">Operational
Support</ulink>.</para>
<itemizedlist>
<listitem>
<para>Commands to start, stop and clear the firewall</para>
</listitem>
<listitem>
<para>Supports status monitoring with an audible alarm when an
<quote>interesting</quote> packet is detected.</para>
</listitem>
<listitem>
<para>Wide variety of informational commands.</para>
</listitem>
</itemizedlist>
</listitem>
<listitem>
<para><emphasis role="bold">VPN Support</emphasis>.</para>
<itemizedlist>
<listitem>
<para><ulink url="manpages/shorewall-tunnels.html">IPSEC, GRE,
IPIP and OpenVPN Tunnels</ulink>.</para>
</listitem>
<listitem>
<para><ulink url="PPTP.htm">PPTP</ulink> clients and
Servers.</para>
</listitem>
</itemizedlist>
</listitem>
<listitem>
<para>Support for <ulink url="traffic_shaping.htm"><emphasis
role="bold">Traffic</emphasis> Control/<emphasis
role="bold">Shaping</emphasis></ulink>.</para>
</listitem>
<listitem>
<para>Wide support for different <emphasis role="bold">GNU/Linux
Distributions</emphasis>.</para>
<itemizedlist>
<listitem>
<para><ulink url="Install.htm#Install_RPM">RPM</ulink> and <ulink
url="http://www.debian.org">Debian</ulink> packages
available.</para>
</listitem>
<listitem>
<para>Includes automated <ulink url="Install.htm">install, upgrade
and uninstall facilities</ulink> for users who can't use or choose
not to use the RPM or Debian packages.</para>
</listitem>
<listitem>
<para>Included as a standard part of <ulink
url="http://leaf.sourceforge.net/devel/jnilo">LEAF/Bering</ulink>
(router/firewall on a floppy, CD or compact flash).</para>
</listitem>
</itemizedlist>
</listitem>
<listitem>
<para><ulink url="MAC_Validation.html">Media Access Control (<emphasis
role="bold">MAC</emphasis>) Address <emphasis
role="bold">Verification</emphasis></ulink>.</para>
</listitem>
<listitem>
<para><emphasis role="bold"><ulink url="Accounting.html">Traffic
Accounting</ulink>.</emphasis></para>
</listitem>
<listitem>
<para><ulink url="bridge-Shorewall-perl.html"><emphasis
role="bold">Bridge</emphasis>/Firewall support</ulink></para>
</listitem>
<listitem>
<para><ulink url="IPv6Support.html"><emphasis
role="bold">IPv6</emphasis> Support</ulink></para>
</listitem>
</itemizedlist>
</section>
</article>