Bro is intended for use by sites requiring flexible, highly customizable intrusion detection. It is important to understand that Bro has been developed primarily as a research platform for intrusion detection and traffic analysis. It is not intended for someone seeking an “out of the box” solution. Bro is designed for use by Unix experts who place a premium on the ability to extend an intrusion detection system with new functionality as needed, which can greatly aid with tracking evolving attacker techniques as well as inevitable changes to a site’s environment and security policy requirements.