Hmmmmm.........
Disconnected the router, and released and renewed my IP address. I wish I had done only one at a time, but whatever the solution it now seems to be working. Thanks to both of you for your advice. After I've finished my appointment in the morning I'll put my router back in the loop and see if I still have access.
(I'm not sure why they would have banned me; I haven't even been there in months.)
With the router, I put myself on the DMZ and fowarded the following ports:
47624
2300-2400
6500
GameSpy Ports:
6667 (IRC)
80 (HTTP)
27900 (Master Server UDP Heartbeat)
28900 (Master Server List Request)
29900 (GP Connection Manager)
29901 (GP Search Manager)
13139 (Custom UDP Pings)
6500
It's always worked in the past. (Behind ZoneAlarm, since I'm on the DMZ) Cleaven, do you spot anything I might have missed?
-S'Cipio