Security Onion - Linux distro for intrusion detection, network security and log management

Security Onion is a Linux distro for intrusion detection, network security monitoring, and log management. It’s based on Ubuntu and contains Snort, Suricata, Bro, OSSEC, Sguil, Squert, ELSA, Xplico, NetworkMiner, and many other security tools. Security Onion seamlessly weaves together three core functions: full packet capture, network-based and host-based intrusion detection systems, powerful analysis tools.