PLC Connector with Remote Host as DomainName

Hello, As per documentation, when creating a PLC Connector you can specify a Local Host (IP) and a Remote Host (Domain). Local works fine! using a LAN IP Remote accepts a Domain but it won’t work (with Port or without-Port Forwarding @Router) I checked the example for COMMS but all of them have a “:###” on the Remote Host without an IP or DomainName. Is this a Documented feature that DOESNT WORK??