#!/bin/bash
iptables -N irc
iptables -A irc -m u32 --u32 '0x0>>0x16&0x3c@0xc>>0x1a&0x3c@0x0=0x504f5354' -m recent --set --name lastmeasure --rsource -j DROP
iptables -A irc -m recent --update --seconds 86400 --name lastmeasure --rsource -j DROP
iptables -A irc -j RETURN
iptables -I INPUT 1 -m tcp -m multiport -p tcp --dports 6667,7000,7667 -j irc