Firestorm is a Network Intrusion Detection sensor which is multi-threaded, fast, and is pluggable at almost every point.
You can download it from the following link: https://packetstormsecurity.com/files/download/25059/firestorm-0.2.0.tar.gz
Source: https://packetstormsecurity.com/files/25059/firestorm-0.2.0.tar.gz.html