shorewall_code/Shorewall-docs2/Shorewall_Doesnt.xml

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

  <articleinfo>
    <title>Some Things that Shorewall Cannot Do</title>

    <author>
      <firstname>Tom</firstname>

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

    <pubdate>2004-03-05</pubdate>

    <copyright>
      <year>2003</year>

      <year>2004</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>

  <section>
    <title>Shorewall Cannot:</title>

    <itemizedlist>
      <listitem>
        <para>Be used to filter traffic through a Layer 2 Bridge (although
        experimental Shorewall Bridge code is available — check <ulink
        url="bridge.html">here</ulink> for details).</para>
      </listitem>

      <listitem>
        <para>Act as a <quote>Personal Firewall</quote> that allows internet
        access by application.</para>
      </listitem>

      <listitem>
        <para>Be used with an Operating System other than Linux (version
        &#62;= 2.4.0)</para>
      </listitem>

      <listitem>
        <para>Do content filtering:</para>

        <itemizedlist>
          <listitem>
            <para>HTTP - better to use <ulink url="Shorewall_Squid_Usage.html">Squid</ulink>
            for that.</para>
          </listitem>

          <listitem>
            <para>Email -- Install something like <ulink
            url="http://www.postfix.org">Postfix</ulink> on your firewall and
            integrate it with <ulink url="http://www.spamassassin.org/">SpamAssassin</ulink>
            and <ulink url="http://www.ijs.si/software/amavisd/">Amavisd-new</ulink>.</para>
          </listitem>
        </itemizedlist>
      </listitem>
    </itemizedlist>
  </section>

  <section>
    <title>In Addition:</title>

    <itemizedlist>
      <listitem>
        <para>Shorewall does not contain any support for Netfilter <ulink
        url="http://www.netfilter.org/documentation/pomlist/pom-summary.html">Patch-O-Matic</ulink>
        features -- Shorewall only supports features from released kernels.</para>
      </listitem>
    </itemizedlist>
  </section>
</article>