I have a network of over 600 terminals all running Win2000.
Last week I experienced that certain machines could not access the internet at all. The error I get while trying to access using IE6 is "TCP/IP error failed".
I can also not send/receive mail.
I can however browse the other computers on the LAN although this could be possible due to netbios protocol.
The DNS settings have not changed and that other machines on the same network work fine.