How to Restoring iptables Automatically On Boot on Debian and Ubuntu

For some reason, Debian can’t do “/etc/init.d/iptables save”. There is no option in iptables which will make your rules permanent. But you can use iptables-save and iptables-restore to fulfill your task.


To save iptables rules to some file like /etc/iptables.rules using following command:

$ sudo iptables-save > /etc/iptables.rules

To make sure the iptables rules are started on a reboot we’ll create a new file: 

$ sudo vi /etc/network/if-pre-up.d/iptables

Add these lines to it: 

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

Don’t forget to make it executable: 

$ sudo chmod +x /etc/network/if-pre-up.d/iptables

Other you can create the following if-up.d script called iptables that restores the saved iptables rule set.

$ sudo vi /etc/network/if-up.d/iptables   #!/bin/bash iptables-restore < /etc/iptables.rules   $ sudo chmod +x /etc/network/if-up.d/iptables

Alternatively, you can add “iptables-restore < /etc/iptables.rules” command to /etc/rc.local, which gets executed at the end of system boot-up.
Add the following command in /etc/rc.local to reload the rules in every reboot.

$ sudo vi /etc/rc.local

 

iptables-restore < /etc/iptables.rules

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