OSSEC HIDS is an Open Source Host-based Intrusion Detection System. It performs log analysis, file integrity checking, Windows registry monitoring, rootkit detection, time-based alerting and active response. It runs on most operating systems, including Linux, *BSD, Windows and Mac.

This version comes with numerous new features and bug fixes, including support for registry monitoring on Windows, dynamic/nat'ed IP addresses in the server/agent communication, ASL (Apple system log), Lotus domino , Symantec AV, Windows RAR.

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