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<article id="shorewall_features">
  <!--$Id$-->

  <articleinfo>
    <title>Shorewall 4.4 Features</title>

    <author>
      <firstname>Tom</firstname>

      <surname>Eastep</surname>
    </author>

    <pubdate><?dbtimestamp format="Y/m/d"?></pubdate>

    <copyright>
      <year>2001-2010</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> or an <trademark>Apple
            MacIntosh</trademark> running OS X.</para>
          </listitem>

          <listitem>
            <para>Centrally generated firewall scripts run on the firewalls
            under control of <ulink
            url="Shorewall-Lite.html">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>.</para>
          </listitem>

          <listitem>
            <para><ulink url="MultiISP.html">Multiple ISP support</ulink>
            (Multiple Internet Links from the same firewall/gateway)</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="simple_traffic_shaping.html"><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>

      <listitem>
        <para>Works with a wide range of <emphasis
        role="bold">Virtualization</emphasis> Solutions:</para>

        <itemizedlist>
          <listitem>
            <para><ulink url="KVM.html"><emphasis
            role="bold">KVM</emphasis></ulink></para>
          </listitem>

          <listitem>
            <para><ulink url="XenMyWay-Routed.html"><emphasis
            role="bold">Xen</emphasis></ulink></para>
          </listitem>

          <listitem>
            <para><ulink url="Vserver.html"><emphasis
            role="bold">Linux-Vserver</emphasis></ulink></para>
          </listitem>

          <listitem>
            <para><ulink url="OpenVZ.html"><emphasis
            role="bold">OpenVZ</emphasis></ulink></para>
          </listitem>

          <listitem>
            <para>VirtualBox</para>
          </listitem>

          <listitem>
            <para><ulink url="LXC.html">LXC</ulink></para>
          </listitem>
        </itemizedlist>
      </listitem>
    </itemizedlist>
  </section>
</article>
