I tried this from a different network last night and when I added the server, I was able to see that 0/20 were connected as opposed to 'Can't Reach Server'. However, when trying to connect to the server, I would immediately get an "End of Stream" error and get thrown back to the main screen.
Watching the server console, no errors were shown, but I got the same "[iNFO] /ipaddress:port lost connection." for each attempt I made.