A packet sniffer built to shows stats for the main protocols eg ARP / IP / TCP / UDP / ICMP. It is also capable of logging some basic information on FTP / POP3 / HTTP protocols. It will also capable of tracking and logging connections for TCP / UDP / ICMP.
This is know to compile on debian but required the linux kernel headers to be installed correctly to compile. so you milage will vary depending on which distro you are using. I stopped development on it as it was overtaken by much better applications like wireshark.