It’s a PHP script that stops bad robots, spammers and other unwanted entities before they can even load your website. It can be implemented in every website and it’s free! You just need access to your hosting and web server with php support. No databases needed.
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.