iptables restart FAQ: How do I make my iptables firewall start/restart after I reboot my Linux system?
I was going to write a tutorial about configuring a firewall on a Linux system using
iptables, but then I found this great CentOS iptables tutorial, and I think they really nailed it.
The only thing I think they didn't fully cover is how you get your Linux iptables firewall to start up again properly after your Linux system is rebooted (which is kind of a huge deal). To that end, I thought I'd describe the process of getting your iptables firewall to restart after a system reboot.
And -- as an added bonus -- this same process will help you get any Linux service to automatically start after a reboot.