IOSec Addons are enhancements for web security and crawler detection
IOSEC PHP HTTP FLOOD PROTECTION ADDONS
IOSEC is a php component that allows you to simply block unwanted access to your webpage. if a bad crawler uses to much of your servers resources iosec can block that.
IOSec Enhanced...
This script written in perl is designed to setup a basic firewall rules to protect your linux box on the Internet. It's use perl and iptables. Work fine with dial and permanent connections (cable/dsl). People don't have any experience with iptables.