NukeNabber sets itself up to listen on TCP and UDP ports
commonly attacked over the internet.  A total of 50
ports can be monitored simultaneously.  ICMP dest_unreach
attacks are now logged.  It is designed to give you the
information you need in order to trace an attacker
including a method of finding an attacker's nickname on
IRC (mIRC, VIRC and PIRCH clients are supported).