I have a global IP and port, however I have the case where a router doesn’t support NAT loopback, so I cant use this, and I need to use the local IP address and the internal port that it’s forwarded to. I’m already aware that i can get around this via the following:

• if the port is forwarded via UPnP i can simply query for the local IP and port using a library
• I can use a vpn or proxy so that i can actually connect from outside the network.

However is there a solution that doesnt involve either of these two methods?