Computer Security Pages that are Stale
edithttps://en.wikipedia.org/wiki/Intrusion_detection_system#Free_and_open_source_systems
This page, and others like it are stale by up to 20 years! This is based on the age of cited documents and references.
This is a note-to-self to revisit, because most of the IPs I use are blocked by Wikipaedia.
I'm doing some research on IDS and IPS, and will circle back to this problem area.