ModSecurity 2.5.5

ModSecurity - Web application firewall Apache module.

ModSecurity is an open source, free web application firewall (WAF) Apache module. With over 70% of all attacks now carried out over the web application level, organizations need all the help they can get in making their systems secure. WAFs are deployed to establish an external security layer that increases security, detects and prevents attacks before they reach web applications. It provides protection from a range of attacks against web applications and allows for HTTP traffic monitoring and real-time analysis with little or no changes to existing infrastructure.

ModSecurity features include XML support, event correlation, transaction scoring, anomaly detection, data persistence, a wealth of anti-evasion functions, regex back-references, support for sessions, and many more.