Hi all. Here's the situation: If I create an AMS1 server in-game (via MP Lobby and "Create Game"), then the server I create shows up in the MP Lobby, and people can join as usual. This tells me that ports and all that are properly forwarded on my router. However, if I create an AMS1 server using the AMS1 Dedicated Server Tool -- on the same machine -- then that server does not appear in the MP Lobby. People can connect to the server directly (by using the + icon and connecting by IP address), which tells me the port forwarding situation must still largely be properly sorted. Anyone have any idea why the server, when created using AMS1 Dedi Tool, fails to show up in MP Lobby? Is there another port that needs to be opened? I've attempted the various adjustments regarding port forwarding and firewall exceptions, per Dann and others, to no avail.
Reinstalling AMS1 sorted the issue, but it doesn't explain what exactly was happening, so I don't feel any more knowledgeable than I did before. Alas.