Hey , I spoke with a networking dev and this is what he had to say:
9999 is a hardcoded value I have in there for “unreachable”. Assuming he means a client on a machine is trying to connect to another machine server then it could be a firewall issue, which is the #1 issue people seem to get wrong when trying to develop for Steam. Is he using lobbies or game server APIs? latter requires ports to be open on his firewall, former doesn’t.
Finding logs for Steam games should still be \saved\logs as always. It might be in the
C:\Games\Steam\steamapps\common\…
or it might be MyDocuments.
disconnect after a minute issue could be p2p connection code that a github user posted a fix for. […] there is a “keep disconnected connection in an array for some time” after people disconnect. If he waits a long time and reconnects does it happen? or no matter how long he waits this happens?