Attacker 2.1 for Win9x/NT4 (25 kb) 
 From NonagsPLUS (Members) (25 kb) 
 Updated: Apr 28, 2000 
 Homepage 
 Author: Robin Keir 
 Description: A TCP/UDP port listener. You provide a list of ports to listen on and the program will notify you when a connection or data arrives at the port(s). Can minimize to the system tray and play an audible alert. This program is intended to act as a guard dog to notify you of attempted probes to your computer via the Internet.


http://www.foundstone.com/rdlabs/