Windows 2000 PCs (SP3) call the Head office Servers seemingly of their own accord several times an hour, even at login prompt.
They connect to an ISDN router via a hub.
The 3 servers are running Win2K (latest service packs) also and are 2 controllers and an Exchange file/print server.
PCs – Netbios is disabled over TCP/IP, as is ‘Register this connections settings in DNS’.
The Microsoft auto-update service is turned off.
The PCs work locally and/or connect the network domain to pick up email etc.
Tel bills are subsequently high, even though PCs are turned off at night.
The rogue calls seem to be using protocols 1 or 17
(ICMP or UDP).
How can I stop these calls please?
