About 2 weeks ago, our MW3 gameservers stopped beeing visible in the Serverlist. On gameserver startup, a message shows that the server can't connect to the steam master server. No firewall or something else is blocking the gameserver from connecting the steam master server, so the assumption is that there is a new version of ther server files with updated steam master servers.
Is this a known issue? How can I fix this problem?
A support case was created for you and you should be contacted shortly by a Customer Support Representative, if you haven't been already. You can view and update your case at the Activision Support website. After logging in, go to "My Support" then "My Cases".