IPTables
can not easily be turned off via the /proc
interface or by removing modules.
But messed up rules can be replaced by the following as long as the modules thmeselves are functioning properly.
echo "Stopping $Firewall" $IPTABLES -F $IPTABLES -X $IPTABLES -P INPUT ACCEPT $IPTABLES -P OUTPUT ACCEPT $IPTABLES -P FORWARD ACCEPT