Reloading iptables

Question

I made changes to iptables config file in /etc/iptables/filter in ubuntu and want to reload them. I read the man page and also googled but couldn't find the information. Any help will be appreciated.

Thank you
Bala

Answer 1

Easiest way is to reboot (also if below does not work, reboot, check if that made the change).

Second easiest is to restart the daemons using iptables configurations (google: restart daemon ubuntu).

examples (depends your configuration):
/etc/init.d/iptables restart
/etc/init.d/networking restart

http://www.networkstuff.eu/index.php/Restart_The_iptables_Daemon

br,
Juha

Answer 2

To activate the firewall rules in your config file you must use:

sudo iptables-restore < /etc/iptables.firewall.rules

And you can check that they are activated with:

sudo iptables -L

If you want that the rules are activated each time you boot the computer create this file:

sudo nano /etc/network/if-pre-up.d/firewall

With this content:

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

And give it permission of execution:

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

Hope it helps you =)

Answer 3

After googling a little, this is what i found to restart iptables. . . sudo /etc/init.d/firewall restart