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88 lines
3.4 KiB
XML
88 lines
3.4 KiB
XML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<article id="shorewall_prerequisites">
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<!--$Id$-->
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<articleinfo>
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<title>Shorewall Requirements</title>
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<author>
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<firstname>Tom</firstname>
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<surname>Eastep</surname>
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</author>
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<pubdate>2004-05-31</pubdate>
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<copyright>
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<year>2001-2004</year>
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<holder>Thomas M Eastep</holder>
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</copyright>
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<legalnotice>
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<para>Permission is granted to copy, distribute and/or modify this
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document under the terms of the GNU Free Documentation License, Version
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1.2 or any later version published by the Free Software Foundation; with
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no Invariant Sections, with no Front-Cover, and with no Back-Cover
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Texts. A copy of the license is included in the section entitled
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<quote><ulink url="GnuCopyright.htm">GNU Free Documentation License</ulink></quote>.</para>
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</legalnotice>
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</articleinfo>
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<section>
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<title>Shorewall Requires:</title>
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<itemizedlist>
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<listitem>
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<para>A kernel that supports netfilter. I've tested with 2.4.2 -
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2.6.6. With current releases of Shorewall, Traffic Shaping/Control
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requires at least 2.4.18. Check <ulink url="kernel.htm">here</ulink>
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for kernel configuration information. If you are looking for a
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firewall for use with 2.2 kernels, see <ulink
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url="http://seawall.sourceforge.net">the Seattle Firewall site</ulink>.</para>
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</listitem>
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<listitem>
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<para>iptables 1.2 or later but beware version 1.2.3 -- see the <ulink
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url="errata.htm">Errata</ulink>.</para>
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<warning>
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<para>The buggy iptables version 1.2.3 is included in RedHat 7.2 and
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you should upgrade to iptables 1.2.4 prior to installing Shorewall.
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Version 1.2.4 is available <ulink
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url="http://www.redhat.com/support/errata/RHSA-2001-144.html">from
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RedHat</ulink> and in the <ulink url="errata.htm">Shorewall Errata</ulink>.</para>
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</warning>
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</listitem>
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<listitem>
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<para>Iproute (<quote>ip</quote> utility). The iproute package is
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included with most distributions but may not be installed by default.
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The official download site is <ulink type="remote"
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url="ftp://ftp.inr.ac.ru/ip-routing">ftp://ftp.inr.ac.ru/ip-routing</ulink>.</para>
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</listitem>
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<listitem>
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<para>A Bourne shell or derivative such as bash or ash. This shell
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must have correct support for variable expansion formats ${<emphasis>variable%pattern</emphasis>},
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${<emphasis>variable%%pattern</emphasis>}, ${<emphasis>variable#pattern</emphasis>}
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and ${<emphasis>variable##pattern</emphasis>}.</para>
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</listitem>
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<listitem>
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<para>Your shell must produce a sensible result when a number n (128
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<= n <= 255) is left shifted by 24 bits. You can check this at
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a shell prompt by:<itemizedlist><listitem><para>echo $((128 <<
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24))</para></listitem><listitem><para>The result must be either
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2147483648 or -2147483648.</para></listitem></itemizedlist></para>
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</listitem>
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<listitem>
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<para>The firewall monitoring display is greatly improved if you have
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awk (gawk) installed.</para>
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</listitem>
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</itemizedlist>
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</section>
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</article>
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