How-Tos Deactivate All Rules #!/bin/sh iptables -F iptables -X iptables -t nat -F iptables -t nat -X iptables -t mangle -F iptables -t mangle -X iptables -P INPUT ACCEPT iptables -P FORWARD ACCEPT iptables -P OUTPUT ACCEPT Set Up Default Rules (Debian) pre-up iptables-restore < /etc/iptables.rules