Troubleshooting
iptables v1.4.2: Unknown arg `(null)’
Try adding -p to the equation
root@host:~# iptables -I OUTPUT –dport 6660:6669 -j DROP
iptables v1.4.2: Unknown arg `(null)’
Try `iptables -h’ or ‘iptables –help’ for more information.
root@host:~# iptables -I OUTPUT -p tcp –dport 6660:6669 -j DROP
root@host:~#