Snort 2.9.0 released

Snort is an open source network intrusion prevention system, capable of performing real-time traffic analysis and packet logging on IP networks.
It can perform protocol analysis, content searching/matching and can be used to detect a variety of attacks and probes, such as buffer overflows, stealth port scans, CGI attacks, SMB probes, OS fingerprinting attempts, and much more.

For Download and ChangeLog check: http://www.snort.org