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90 lines
3.1 KiB
XML
90 lines
3.1 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>
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<!--$Id$-->
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<articleinfo>
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<title>DHCP</title>
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<authorgroup>
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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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</authorgroup>
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<pubdate>2002-11-03</pubdate>
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<copyright>
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<year>2001</year>
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<year>2002</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>If you want to Run a DHCP Server on your firewall</title>
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<itemizedlist>
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<listitem>
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<para>Specify the <quote>dhcp</quote> option on each interface to be
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served by your server in the /etc/shorewall/interfaces file. This will
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generate rules that will allow DHCP to and from your firewall system.</para>
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</listitem>
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<listitem>
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<para>When starting <quote>dhcpd</quote>, you need to list those
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interfaces on the run line. On a RedHat system, this is done by
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modifying /etc/sysconfig/dhcpd.</para>
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</listitem>
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</itemizedlist>
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</section>
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<section>
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<title>If a Firewall Interface gets its IP Address via DHCP</title>
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<itemizedlist>
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<listitem>
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<para>Specify the <quote>dhcp</quote> option for this interface in the
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<ulink url="Documentation.htm#Interfaces">/etc/shorewall/interfaces</ulink>
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file. This will generate rules that will allow DHCP to and from
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your firewall system.</para>
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</listitem>
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<listitem>
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<para>If you know that the dynamic address is always going to be in
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the same subnet, you can specify the subnet address in the
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interface's entry in the <ulink url="Documentation.htm#Interfaces">/etc/shorewall/interfaces</ulink>
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file.</para>
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</listitem>
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<listitem>
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<para>If you don't know the subnet address in advance, you should
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specify <quote>detect</quote> for the interface's subnet address
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in the <ulink url="Documentation.htm#Interfaces">/etc/shorewall/interfaces</ulink>
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file and start Shorewall after the interface has started.</para>
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</listitem>
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<listitem>
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<para>In the event that the subnet address might change while
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Shorewall is started, you need to arrange for a <quote>shorewall
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refresh</quote> command to be executed when a new dynamic IP address
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gets assigned to the interface. Check your DHCP client's
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documentation.</para>
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</listitem>
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</itemizedlist>
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</section>
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</article> |