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95 lines
3.2 KiB
XML
95 lines
3.2 KiB
XML
<?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>2005-09-14</pubdate>
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<copyright>
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<year>2001-2005</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
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License</ulink></quote>.</para>
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</legalnotice>
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</articleinfo>
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<caution>
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<para><emphasis role="bold">This article applies to Shorewall 3.0 and
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later. If you are running a version of Shorewall earlier than Shorewall
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3.0.0 then please see the documentation for that
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release.</emphasis></para>
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</caution>
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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 <emphasis role="bold">Linux</emphasis> kernel that supports
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netfilter (No, it won't work on BSD or Solaris). I've tested with
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2.4.2 - 2.6.13. Check <ulink url="kernel.htm">here</ulink> for kernel
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configuration information.</para>
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</listitem>
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<listitem>
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<para>iptables 1.2 or later (but I recommend at least version
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1.2.9)</para>
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</listitem>
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<listitem>
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<para>Iproute (<quote>ip</quote> and "tc" utilities). The iproute
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package is included with most distributions but may not be installed
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by default. The official download site is <ulink type="remote"
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url="http://developer.osdl.org/dev/iproute2/download/">http://developer.osdl.org/dev/iproute2/download/</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
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${<emphasis>variable%pattern</emphasis>},
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${<emphasis>variable%%pattern</emphasis>},
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${<emphasis>variable#pattern</emphasis>} and
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${<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 a
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shell prompt by:<itemizedlist>
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<listitem>
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<para>echo $((128 << 24))</para>
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</listitem>
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<listitem>
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<para>The result must be either 2147483648 or
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-2147483648.</para>
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</listitem>
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</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> |