it's not a port issue.

i have the same problem and posted about it after 0.35 was released because that's when it started happening more frequently.

the server can be up for a while on the master server list, any time from 5 minutes to 48+ hours, when the "Disconnected from Master Server" message appears randomly in the console and the server drops from the master server list. people stay connected but eventually everyone leaves because no new players can see the server to join it.

the only solution i know of is restarting the server, which isn't so good because that means resetting the map.

need an update to force reconnection to master server.

Check your firewall. On Server 2008R2 (Server equivalent of Win7) you need to open the ports in the firewall and unblock the application. (Ports are UDP I believe, but I opened TCP as well) I had the same error with forwarded ports until I messed with the firewall.

The port is open

Open the port 32887

bump

So, it says im disconnected from master server, but when I try to connect to my own server, it works, what do I do?