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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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2002-11-09 19:10:22 +01:00
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<meta http-equiv="Content-Language" content="en-us">
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<meta name="ProgId" content="FrontPage.Editor.Document">
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<title>DHCP</title>
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</head>
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2003-11-17 22:06:32 +01:00
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<body>
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<h1 style="text-align: center;">DHCP<br>
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</h1>
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2002-11-09 19:10:22 +01:00
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<h2 align="left">If you want to Run a DHCP Server on your firewall</h2>
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<ul>
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2003-11-17 22:06:32 +01:00
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<li>
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<p align="left">Specify the "dhcp" option on each interface to be
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served
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by your server in the <a href="Documentation.htm#Interfaces">/etc/shorewall/interfaces</a>
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file. This will generate rules that will allow DHCP to and from your
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firewall
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system. </p>
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</li>
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<li>
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<p align="left">When starting "dhcpd", 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. </p>
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</li>
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</ul>
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<h2 align="left">If a Firewall Interface gets its IP Address via DHCP</h2>
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<ul>
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2003-11-17 22:06:32 +01:00
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<li>
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<p align="left">Specify the "dhcp" option for this interface in the
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<a href="Documentation.htm#Interfaces">/etc/shorewall/interfaces</a>
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file. This will generate rules that will allow DHCP to and from
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your firewall system. </p>
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</li>
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<li>
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<p align="left">If you know that the dynamic address is always
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going to
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be in the same subnet, you can specify the subnet address in the
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interface's entry in the <a href="Documentation.htm#Interfaces">/etc/shorewall/interfaces</a>
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file. </p>
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</li>
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<li>
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<p align="left">If you don't know the subnet address in advance,
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you should specify "detect" for the interface's subnet address in the <a
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href="Documentation.htm#Interfaces">/etc/shorewall/interfaces</a> file
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and start Shorewall after the interface has started. </p>
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</li>
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<li>
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<p align="left">In the event that the subnet address might change
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while Shorewall is started, you need to arrange for a "shorewall
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refresh" command to be executed when a new dynamic IP address gets
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assigned to the interface. Check your DHCP client's documentation. </p>
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</li>
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2002-08-22 23:33:54 +02:00
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</ul>
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2002-11-09 19:10:22 +01:00
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<p align="left"><font size="2">Last updated 11/03/2002 - <a
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href="support.htm">Tom Eastep</a></font></p>
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<p><font face="Trebuchet MS"><a href="copyright.htm"><font size="2">Copyright</font>
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<EFBFBD> <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font></p>
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<br>
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<br>
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2002-08-22 23:33:54 +02:00
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</body>
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2002-11-09 19:10:22 +01:00
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</html>
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