The most comprehensive list of host intrusion detection websites last updated on Sep 1 2023. Stats collected from various trackers included with free apps.
OSSEC - World's Most Widely Used Host Intrusion Detection System - HIDS OSSEC is a multiplatform, open source and free Host Intrusion Detection System (HIDS). You can tailor OSSEC for your security needs through its extensive configuration options, adding custom alert rules and writing scripts.