mod_httpbl is described as 'The mod_httpbl Apache module is ideal for leveraging the Project Honey pot http:BL services within the context of an Apache web server. Built on the Apache APIs, the mod enables web admins to block comment spammers, harvesters, and other malicious IPs' and is a Anti-Spam tool in the development category. There are three alternatives to mod_httpbl for a variety of platforms, including Mac, Linux, BSD, MediaWiki and Wordpress apps. The best mod_httpbl alternative is Bad Behavior, which is both free and Open Source. Other great apps like mod_httpbl are AbyssGuard and blq.
Bad Behavior is designed to integrate into your PHP-based Web site, running as early as possible to throw out spam bots before they have the opportunity to vandalize your site with their junk, or even to scrape your pages for e-mail addresses and forms to fill out.
Visitor verification that blocks scrapers, bots, and attacks before they reach your site. Zero false positives. Works with any platform.
