A collection of open source tools — all configured to work together. Very interesting concept. Here are a few that it has.
- Arpwatch, used for mac anomaly detection.
- P0f, used for passive OS detection and os change analisys.
- Pads, used for service anomaly detection.
- Nessus, used for vulnerability assessment and for cross correlation (IDS vs Security Scanner).
- Snort, the IDS, also used for cross correlation with nessus.
- Spade, the statistical packet anomaly detection engine. Used to gain knowledge about attacks without signature.
- Tcptrack, used for session data information which can grant useful information for attack correlation.
- Ntop, which builds an impressive network information database from which we can get aberrant behaviour anomaly detection.
- Nagios. Being fed from the host asset database it monitors host and service availability information.
- Osiris, a great HIDS.
(thanks to Average Admins for the find)
