I have recently started with a broadband account (2Mb) and occasionally both last week and the beginning of this week I have been running an online gaming server for online Doom (ZDaemon).
All has worked well until the second half of this week when my server has failed to work properly. The server starts up but isn't available in the main server list - so no other players can see the server and no one can play on it.
All the server settings within the ZDaemon software are exactly the same as when the server was working. It has been suggested that maybe the ISP (Plusnet) has altered UDP settings or something similar.
Please could someone tell me what has happened and how I can rectify the problem.