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Debian/Ubuntu

After you add the rules and issue the 'iptables-save' command, you want those rules to remain there after a reboot. This is a bit trickier to do than on a RH based system. Here is one way:

1. Save your iptables to a file using the following command:

Code:

iptables-save > /etc/iptables.conf

2. Then edit the /etc/network/interfaces file by adding the following line right after 'iface eth0 inet static':
 

Code:

  pre-up iptables-restore < /etc/iptables.conf

That should do it!

This is also how you change the firewall rule on Debian, essentially restarting the firewall.

A good how-to is also located here: http://wiki.debian.org/iptables

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