The Open Information Security Foundation has released Suricata.
From the OISF website :
The Suricata Engine is an Open Source Next Generation Intrusion Detection and Prevention Engine. This engine is not intended to just replace or emulate the existing tools in the industry, but will bring new ideas and technologies to the field.
Currently (as of version 0.8), the Suricata engine has the following features :
- Automatic Protocol Detection
- Gzip Decompression
- Independent HTP Library (HTTP Parser from Ivan Ristic)
- Standard Input Methods
- Unified2 Output
- Flow Variables
- Fast IP Matching
- HTTP Log Module
If you’re interested to learn more about it, please do visit OISF website.
But beware that at this moment, Suricata is still in beta phase, so you might want to test it before using it in the production site.