Hi there @paulhannefortho,

I could suggest checking out this tutorial here on how to forward ports through a Linux gateway with Iptables:

https://www.digitalocean.com/community/tutorials/how-to-forward-ports-through-a-linux-gateway-with-iptables

It goes through the process of permitting forwarding at the kernel level, setting up access to allow forwarding of the specific port’s traffic between two interfaces on the firewall system, and configuring the NAT rules so that the packets can be routed accordingly.

Hope that this helps!
Regards,
Bobby