>When I enable DMZ, all internet access is shut off.
Enabling DMZ means all traffic is send to the local IP adr set when DMZ was confgured. Have you set 192.192.1.51 as the DMZ adr?
Your port forward rules of all ports to 192.192.1.51 is the same as using DMZ, but you can't use port forward and DMZ at the same time. As I understand your picture of the port forward page you forward all ports to 192.192.1.51, but that rule is disabled. It should be enabled.
Using DMZ is a securitity issue so don't use DMZ. I suggest you follow the recomendations in the manual and only forward the needed ports (13000-13002 and the port you select for the radio RRC web page) to your radio RRC 192.192.1.51.
The networking checklist of Mitch is a good one and should be included in the Remoterig Users Manual.
73, Palle, OZ1RH.