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<h1 align="center"><font color="#ffffff">DHCP</font></h1>
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<h2 align="left">If you want to Run a DHCP Server on your firewall</h2>
<ul>
<li>
<p align="left">Specify the "dhcp" option on each interface to be
served by your server in the <a href="Documentation.htm#Interfaces">/etc/shorewall/interfaces</a>
file. This will generate rules that will allow DHCP to and from your
firewall system. </p>
</li>
<li>
<p align="left">When starting "dhcpd", you need to list those interfaces
on the run line. On a RedHat system, this is done by modifying /etc/sysconfig/dhcpd.
</p>
</li>
</ul>
<h2 align="left">If a Firewall Interface gets its IP Address via DHCP</h2>
<ul>
<li>
<p align="left">Specify the "dhcp" option for this interface in the
<a href="Documentation.htm#Interfaces">/etc/shorewall/interfaces</a>
file.�This will generate rules that will allow DHCP to and from your firewall
system. </p>
</li>
<li>
<p align="left">If you know that the dynamic address is always going
to be in the same subnet, you can specify the subnet address in the interface's
entry in the <a href="Documentation.htm#Interfaces">/etc/shorewall/interfaces</a>
file. </p>
</li>
<li>
<p align="left">If you don't know the subnet address in advance, you
should specify "detect" for the interface's subnet address in the <a
href="Documentation.htm#Interfaces">/etc/shorewall/interfaces</a> file
and start Shorewall after the interface has started. </p>
</li>
<li>
<p align="left">In the event that the subnet address might change while
Shorewall is started, you need to arrange for a "shorewall refresh"
command to be executed when a new dynamic IP address gets assigned to
the interface. Check your DHCP client's documentation. </p>
</li>
</ul>
<p align="left"><font size="2">Last updated 11/03/2002 - <a
href="support.htm">Tom Eastep</a></font></p>
<p><font face="Trebuchet MS"><a href="copyright.htm"><font size="2">Copyright</font>
� <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font></p>
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