Ethereal : DotPup Download∞ Screenshot∞ Forum Thread∞ Ethereal allows you to capture and view the contents of packets in real time aka "packet sniffer" Note -> You will need to get tcpdump∞ and libsnmp. You should be able to find libsnmp or libnetsnmp via PupGet.

FireLog : Download∞ Screenshot∞ Forum Thread∞ FireLog is a front end for iptables, netstat and rc.firewall. Provides real time statistics in the console or in a web browser about your firewall or network connections.

NMap : DotPup Download∞ Screen shot∞ Forum Thread∞ "Nmap ('Network Mapper') is a free open source utility for network exploration or security auditing. It was designed to rapidly scan large networks,...."

NMap Front End : DotPup Download∞ Screen shot∞ Forum Thread∞ A GUI front end for NMap

IPTState : DotPup Download∞ Screenshot∞ Forum Thread∞ This is like "top", for iptables. IP Tables State implements the "state top" feature from IP Filter for IP Tables. "State top" displays the states held by your stateful firewall in a "top"-like manner.

IPTables : Firewall (man page∞) Puppy firewall loads from /etc/rc.d/rc.firewall

Xtraceroute : DotPup Download∞ Screen shot∞ Forum Thread∞ Visual traceroute program