[books]Apache Security

http://www.oreilly.com/catalog/apachesc/
http://www.oreilly.com/catalog/apachesc/desc.html

• install and configure Apache
• prevent denial of service (DoS) and other attacks
• securely share servers
• control logging and monitoring
• secure custom-written web applications
• conduct a web security assessment
• use mod_security and other security-related modules

どの書籍にもmod_securityの内容が書かれてきてますな。