Regeln speichern:

iptables-save > /etc/iptables/rules.v4
ip6tables-save > /etc/iptables/rules.v6

Regeln laden:

iptables-restore < /etc/iptables/rules.v4
ip6tables-restore < /etc/iptables/rules.v6

Regeln bei Neustart automatisch einspielen:

/etc/network/if-pre-up.d/iptables

#!/bin/bash
iptables-restore < /etc/iptables/rules.v4
ip6tables-restore < /etc/iptables/rules.v6