oh wait it were others that derailed this thread, sorry
. But the thing still remains the update didn't try to fix your issue.
Can you post a full log file from the server (ucc.log in the server system folder). That will give me some more info.
Anyway its probably a firewall issue, since the masterserver changed to a different one with who knows what ports, ill update this post when i find some info on what ports it could be using.
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Maybe try the following I looked around a bit for other steam games to get an idea of what ports are needed. Slightly edited someones post with a bit wider port range, of where people say the masterservers of steam are.
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Don't block anything outbound (UDP or TCP). For incoming you need
27000 -> 27020 UDP (and possibly others mess around with making the range bigger, original post said 27009 to 27014) and your server port on UDP, with only your server port set to port forwarding. You also need to allow any established TCP/IP connection packets back in.
You only need this list if you have setup special firewall rules, the
default rules for SOHO routers/firewalls will let a server work once you
enable port forwarding (or you could just make use of the DMZ feature).