So here we are: at first, quake 3 used to search for all servers he could find and it was fine.
But then, one random day, i went multiplayer and he said 'no response from master server', which i think is the server supposed to search for servers, because using the ip i can specify the server i want and join anyway.

now here's the question: is this because on an internal problem or external? (a friend of mine had that too)