July 18, 2022
Linux NAT Firewall Setup
A NAT Firewall is needed in many situations to allow a private network to communicate with the larger world, the most common example of this would be a home WiFi router that provides a private network space and then links to a WAN connection provided by an ISP.
I was recently setting up such a system at work to allow systems on a private network to be able to communicate with the internet for software updates, etc. There is a lot of info out there to set this up, many older guides focus on iptables rules, but I wanted something that used the newer firewall-cmd software. After some googling and piecing together some things, I came up with the following script.
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