Plesk – Mod Security Web Application Firewall Comodo rules explained

If you’re using Plesk with ModSecurity and the free Comodo ruleset, understanding the rule categories is essential for effective website security. These rules protect your site from threats like SQL injection, cross-site scripting (XSS), brute force attacks, information disclosure, and protocol violations. Comodo’s ruleset also includes specialized protections for popular platforms like WordPress, Joomla, and Drupal, as well as safeguards against backdoors and malicious bots. While these rules provide robust security for your web applications, some—such as those targeting PHP information disclosure—can be overly sensitive and may require customization to prevent false positives and ensure smooth website functionality. Properly configuring ModSecurity in Plesk helps balance strong security with optimal site performance.