ZB Block

ZB Block is a fast all-around php driven security pre-parser for securing websites against several forms of attack, including robots, hackers, some spambots, and known bad hosts. It includes an installing setup.php that makes setting it up on your website, blog, bulletin board, or CMS site as easy as puting up a graphic (task comparison). The script uses intelligent, extensible signature rules to detect bad behavior. Using flat-file methods, the signatures are stored in an .inc, to prevent being disrupted by SQL injection attacks. Execution time for script is 1/10th of a second or less (unnoticeably fast) on a 930 Mhz PIII, and in that time checks for more than 100 million bad addresses, and many attacks. If an attack is detected it logs the pertinent data in a .txt and a .csv, displays the forbidden screen, and then sleeps for around 30 seconds to prevent flooding. The 403 http_forbidden error includes a description of why the client was blocked.