How to restore iptables rules after reboot?

Question

iptables

I'm trying to restore the iptables rules after a reboot, they were originally written in the /etc/firewall.conf file. I

create a file for auto-recovery:
nano -w /etc/network/if-up.d/iptables

In the file:

#!/bin/sh
iptables-restore < /etc/firewall.conf

I set the permissions on the file:
chmod +x /etc/network/if-up.d/iptables

After a reboot, the rules are not restored ...
If you start it in manual mode:
iptables-restore < /etc/firewall.conf

Everything works ... I don’t understand what’s wrong ....

Answer 1

What for to a crutch if there is a package which is specially intended for this purpose iptables-persistent?