Fortinet
FortiWeb 5 OS
Fortinet introduced the next-generation operating system (OS) for its FortiWeb Web application firewalls product family, providing important new security advancements to protect against increasingly malicious application layer attacks. The new FortiWeb 5 OS, which is backward compatible with the entire FortiWeb family, features critical security advancements that include the ability to accurately identify the origin of Web application traffic to proactively distinguish between legitimate and malicious sources. FortiWeb provides the ability to distinguish between legitimate and known search engine requests, scanners, crawlers and other threshold-based tools.
http://www.fortinet.com/products/fortiweb/index.html