Rudi Starcevic <tech@xxxxxxxxxxxx> writes: > Hi, > > I've just built a new 2.6.20.1 kernel and am seeing > this error from my standard firewall script: > > iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT > iptables: Invalid argument To use state, you must also specify the protocol eg iptables -A INPUT -p tcp -m state --state ESTABLISHED,RELATED -j ACCEPT