The Security Onion LiveDVD is a bootable DVD that contains software used for installing, configuring, and testing Intrusion Detection Systems. It is based on Xubuntu 10.04 and contains Snort, Suricata, Sguil, Squert, Xplico, nmap, metasploit, Armitage, scapy, hping, netcat, tcpreplay, and many other security tools.

Download
http://sourceforge.net/projects/security-onion/files/20110913/