dns proxy

Specifies that nmbd 8 when acting as a WINS server and finding that a NetBIOS name has not been registered, should treat the NetBIOS name word-for-word as a DNS name and do a lookup with the DNS server for that name on behalf of the name-querying client.
Note that the maximum length for a NetBIOS name is 15 characters, so the DNS name (or DNS alias) can likewise only be 15 characters, maximum.
nmbd spawns a second copy of itself to do the DNS name lookup requests, as doing a name lookup is a blocking action.

Supported on: At least Microsoft Windows 7 or Windows Server 2008 family

dns proxy
Registry HiveHKEY_LOCAL_MACHINE
Registry PathSoftware\Policies\Samba\smb_conf\dns proxy
Value Namedns proxy
Value TypeREG_DWORD
Default Value1
True Value1
False Value0

samba.admx

Administrative Templates (Computers)