Saving and Restoring iptables Rules
The iptables package comes with two more tools that are very useful, specially if you are dealing with larger rule-sets.
These two tools are called iptables-save and iptables-restore
Firewall rules are only valid for the time the computer is on; so, if the system is rebooted, the rules are automatically flushed and reset.
To save the rules so that they are loaded later, use the following command:
The rules are stored in the file /etc/sysconfig/iptables and are applied whenever the service is started or restarted, including when the machine is rebooted.
The above command will in other words save the whole rule-set to a file called /etc/iptables-save with byte and packet counters still intact.
Example
Save current iptables firewall rules:
To restore iptables rules:
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