iptables 룰 영구적으로 저장

1. create /etc/network/if-pre-up.d/iptables file and put

#!/bin/sh
iptables-restore < /etc/iptables.rules
exit 0


2. create /etc/network/if-post-down.d/iptables file and put

#!/bin/sh
iptables-save -c > /etc/iptables.rules
if [ -f /etc/iptables.rules ]; then
    iptables-restore < /etc/iptables.rules
fi
exit 0



jkpark@cactus:~$ sudo chmod +x /etc/network/if-post-down.d/iptables
jkpark@cactus:~$ sudo chmod +x /etc/network/if-pre-up.d/iptables