ModSecurity is an open source product licensed under ASLv2. It comes with full source code and documentation. Current releases are signed by Breno Silva. These public keys are available via most PGP key server mirrors.
ModSecurity Status: v2.7.3
ModSecurity for Apache (Stable Release Quality)Installation information for Apache
ModSecurity for IIS (Stable Release Quality)Installation information for IIS
ModSecurity for Nginx (RC Release Quality)Installation information for Nginx
Community-Produced Binary packages
There are no binary packages on modsecurity.org. Below is a list of third-party sites that sometimes have an up-to-date binary version of ModSecurity: