OSSEC HIDS
Details
OSSEC is an Open Source Host-based Intrusion Detection System. It performs log analysis, file integrity checking, policy monitoring, rootkit detection, real-time alerting and active response.
OSSEC was acquired by Third Brigade in the summer of 2008.
More recently Third Brigade was acquired by Trend Micro. – Press Release
I still have the great pleasure of working with Daniel Cid, the creator of OSSEC. Keep your eye out for some really great security tools integrated with social media. Check out Sucuri.
