- ModSecurity Users Mail-list (SourceForge) - http://lists.sourceforge.net/lists/listinfo/mod-security-users
- ModSecurity Developers Mail-list (SourceForge) - http://lists.sourceforge.net/lists/listinfo/mod-security-developers
- OWASP ModSecurity Core Rules Mail-list (OWASP) - https://lists.owasp.org/mailman/listinfo/owasp-modsecurity-core-rule-set
- You can also join the #modsecurity channel on irc.freenode.net.
- Commercial Support through Trustwave's Technical Assistance Center (TAC) - https://www3.trustwave.com/modsecurity-rules-support.php
- Professional Services offer by Trustwave SpiderLabs Research Team
- ModSecurity Training
- ModSecurity Handbook
- ModSecurity Handbook is "The definitive guide to the popular open source web application firewall", written by Ivan Ristic (original author of ModSecurity). The book is available from Feisty Duck in hard copy or with immediate access to the digital version which is continually updated.
- Web Application Defender's Cookbook: Battling Hackers and Defending Users
- The Web Application Defender's Cookbook: Battling Hackers and Protecting Users is a book written by the ModSecurity Project Lead and OWASP ModSecurity Project Lead Ryan Barnett. The book outlines critical defensive techniques to protect web applications and includes example ModSecurity rules/scripts.
- ModSecurity 2.5
- ModSecurity 2.5 is "A complete guide to using ModSecurity", written by Magnus Mischel. The book is available from Packt Publishing in both hard copy and digital forms.
- Apache Security
- Apache Security is a comprehensive Apache Security resource, written by Ivan Ristic for O'Reilly. Two chapters (Apache Installation and Configuration and PHP) are available as free download, as are the Apache security tools created for the book.
- Preventing Web Attacks with Apache
- Preventing Web Attacks with Apache. Building on his groundbreaking SANS presentations on Apache security, Ryan C. Barnett reveals why your Web servers represent such a compelling target, how significant exploits are performed, and how they can be defended against.