2.2.1.2 DNS Secure Name Query Fallback

Key: Software\Policies\Microsoft\Windows NT\DNSClient or System\CurrentControlSet\services\Dnscache\Parameters<2>

Value: "DnsSecureNameQueryFallback"

Type: REG_DWORD

Size: 32 bits.

Data: This field is a 32-bit value, which MUST contain one of the following values.

Value

Meaning

0x00000000

Only use Link-Local Multicast Name Resolution (LLMNR) and NetBIOS if the name does not exist in DNS.

0x00000001

Always fall back to LLMNR and NetBIOS for any kind of name resolution error.

0x00000002

Always fall back to LLMNR and NetBIOS if the name does not exist in DNS or if the DNS servers are unreachable when on a private network.