Although I haven't tried it, I would assume you should be able to accomplish
it by going to Services: DHCP and adding an entry for that person's MAC
address and forcing it an IP address based on that MAC. Who is to say then
the person won't spoof a MAC address then and achieving the same result.
From: Bryan Brayton [mailto:bryan at sonicburst dot net]
Sent: Saturday, August 28, 2004 5:43 PM
To: m0n0wall at lists dot m0n0 dot ch
Subject: [m0n0wall] How to deny a client multiple dhcp addresses
I have a client pulling 2 dhcp addresses on the same mac address. How
do I go about restricting the dhcp service to 1 address per mac?