virtualbox.org

We updated Windows Server 2003 Enterprise yesterday. The vbox guests have network connectivity, nslookup, ping, tracert all work, but the guests cannot authenticate to the domain or map a network drive. The host can authenticate and map drives. Firewalls are turned off in host and guests.

Any help would be appreciated.

Mac address of Guests changed?

No - the problem was the when vbox 3.0.4 was introduced (updated from 2.x), it added a network piece that sat on top of the host's IP address. So the packets destined for the guests were being intercepted by the host.

The fix was to disable that new interface.