Snort

Title: Snort

Publisher: Sourcefire

Home Page: http://www.snort.org/

License: GNU General Public License

Platforms: Windows XP Linux Unix

Snort is free, open source, and one of the best network intrusion detection systems (NIDS) available. Snort has a large user community and is backed by a commercial company, Sourcefire.


Legend:
Windows XP Works with a flavor of Windows
Linux Works with most Linux flavors
Unix Works with BSD and other Unix flavors