@Marvin_S I can set up port forwarding. I want to limit the IPs that can access that port. IE. I forward port 1234 to internal ip 192.168.1.100 I only want external IP 8.8.8.8 to be able to acces...

I am trying to limit access to NAT devices to specific external address. I can do this with my Asus routers going back to at least 2012 but can't find a way to do this with this router.