ModSecurity is an open source intrusion detection and prevention engine for web applications. Operating as an Apache Web server module, the purpose of ModSecurity is to increase web application security, protecting web applications from known and unknown attacks.

To use Mod Security to minimize spam, you need to rules: 30_asl_antispam.conf and 30_asl_antispam_referrer.conf. These rules, as well other rules, can be downloaded from Atomicorp Web site.

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