From: Chris Henderson <henders254@...>
Date: 2009-03-17T20:15:37+09:00
Subject: detect rogue DHCP server

I want to write a program to detect rogue DHCP server on my (switched)
network. It would broadcast a "dummy" MAC address and see which DHCP
server responds. My idea is to send a DHCPDISCOVER packet and see
which DHCP server sends an ACK packet (but never acknowledge the ACK
and terminate the connection).

How do I go about writing this in Ruby?

Thanks for any suggestions.