Two site URLs, 1 public IP, PAT to test server on 443

Port forwarding rule

I have an external ip address (PortB:8) currently used for a production website on port 443.

I would like to be able to access a test web server via the same public IP via port 65443 and translate to port 443 at the server.

i.e.  https://production-site.com goes to public IP 20.20.20.20 on port 443 which NATs to server 1 on 443

I’d like to set https://test-site.com:65443 to go to public IP 20.20.20.20 on 65433, and then PAT to 443 to the test server 2.

External DNS, both production-site.com and test-site.com point to the same IP address.

There is an existing Firewall rule for port 443 and a NAT rule to send it to Server 1

I have created a firewall rule allowing port 65443

And a NAT rule taking 65443 and PAT to 443 to server 2

But when I test the connection in an external web browser it says the site can’t be reached.

I have read and watched so many guides I’m losing my mind.  I have deleted and rebuilt the rules a dozen times with no improvement. 

Any help is greatly appreciated.