#!/bin/sh

iptables -N Wpddosblock
iptables -I INPUT -p tcp --dport 80 -m string --to 70 --algo bm --string 'GET /' -j Wpddosblock
iptables -A Wpddosblock -p tcp --dport 80 -m string --to 80 --algo bm ! --string 'User-Agent: WordPress/' -j RETURN
iptables -A Wpddosblock -p tcp --dport 80 -m string --to 300 --algo bm --string 'verifying pingback from' -j DROP
iptables -A Wpddosblock -j RETURN