The router needs to have the capability of having a different port for the public port from the local port in a port forward.
Most do but some only offer one port number in a port forward and in such case only one server can be used
So to have multiple PMS’s on the same network
Port forward in the router - these are examples
PMS1
Port Forward public/wan tcp port 32410 to private/local port 32400 and forward to local IP of PMS 1
PMS1 Remote Access advanced settings, tick manually specify port and enter 32410 in the box
PMS2
Port Forward public/wan tcp port 32420 to private/local port 32400 and forward to local IP of PMS 2
PMS2 Remote Access advanced settings, tick manually specify port and enter 32420 in the box
so both forward to 32400 but each has different public / wan port
