UDP in new Win XP SP3

[rado2]

I have new computer with fresh windows xp home sp3 installation (all drivers installed).
I have bzflag 2.0.10, and I'm kicked from all servers because of UDP.
I've installed windows 7 in other partition and bzflag works. So it is not ISP or router related problem.
I've tried to disable antivirus and XP firewall with no success.
I've run wireshark and captured packets while connectiong to server. The only UDP packet captured was sent from my IP to 255.255.255.255 , bzflag port. No other UDP packets received nor sent.
Any idea what could be wrong?

[joevano]

Yep, a firewall or SOMETHING on your PC... are you sure your anti-virus suite doesn't have a firewall?

[rado2]

I've tried older version, 2.0.8 and it works. Something is wrong with latest version

[rado2]

Unbelievable. I've tried 2 servers with older version and it worked. I've restarted it and now it does not work. It kicks me after 1st shot.

[joevano]

Yep, the client works... something on your PC is blocking it.

[Dontkillme]

Maybe your pc is infected (Spyware, Virus,...)?

[blast]

rado2, do you by chance use Nod32 for your anti-virus?

Common Support Issues > Kicked for not using UDP

There was an issue with Nod32 that was incorrectly classifying BZFlag as a web browser (since it makes requests via HTTP to get the server list and the message of the day). This caused Nod32 to block UDP communication for BZFlag. There's some info on that section of that wiki page that tells you how to fix that.