Or the port used by the master server is currently used by another app making the server list respond with what so ever the program using the port contacts with, no?
I believe this is a known issue, I don't think it's in the filters, let me dig out the topic
EDIT: Finally!!! It took me a while, but here, I'm sure it will help you a lot!
http://www.teeworlds.com/forum/viewtopi … 377#p72377
In the final post Kottizen says:
Kottizen wrote:The problem has nothing to do with neither ping, compatible version or whatnot.
Why this is happening is because port 8300 is open, which is the port that the master servers use. However, all other ports (which the Teeworlds servers use) seem to be closed/blocked and therefore the client cannot connect to the server and query it for information about the name, number of players etc.
Very unlikely problem, you should check your firewall, anti-virus program and router to see if there are any security
That's what i tried to tell you in the beginning, but make sure you read the whole topic!
Wish you luck!