We have a domain spread over two sites. Each site has a DC, one is SBS 2003, the other is Server 2003 R2. Clients at each site have mapped network drives both on the local server and the remote server. Each DC has a WINS server and the two WINS servers replicate successfully. In our VPN router we have enabled the setting "Allow NetBIOS Traffic Through All IPSec Tunnels". When I disable this, I cannot see mapped network drives. Why is this when the local WINS servers should be doing NETBIOS name resolution? Surely the WINS clients query the local WINS server to resolve NETBIOS names and no NETBIOS traffic should go through the VPN tunnel. Can any one explain what is going on here?
I should add that both DCs are DNS servers, DHCP servers and GCs.