[2.0.28] Multiplayer connection issues between public & private servers

[mrvirite]

I've set up a server, however if I have it set with `"public": false` all player connections, other than my own, seem to fail,.
However, if I set the server as public with a password, players are able to find it in the server browser and connect.

The server logs don't report anything when a player tries to connect.

This instance is in AWS, and I assume everything must be set up correctly if I'm able to connect.

I've asked players to try a combination of: DNS, IP, IP & Port to connect, and all fail on the client side.

[Rseding91]

A sever set to public will do NAT punching through our servers. A server set to private will not.

That means the firewall on the server is not setup to port forward correctly to host without NAT punching.