Modify ip-tables directly in ubuntu
To modify ip-tables directly in ubuntu First save off your current config: $ sudo -s $ iptables-save > /root/working.iptables.rules $ iptables-save > /root/working.iptables.rules.to.modify At this point you can modify the file. Once your are satisfied restore it # iptables-restore < /root/working.iptables.rules.to.modify