Policy
Turn off multicast name resolution
Specifies that link local multicast name resolution (LLMNR) is disabled on the DNS client. LLMNR is a secondary name resolution protocol. With LLMNR, queries are sent using multicast over a local network link on a single subnet from a DNS client to another DNS client on the same subnet that also has LLMNR enabled. LLMNR does not require a DNS server or DNS client configuration, and provides name resolution in scenarios in which conventional DNS name resolution is not possible. If you enable this policy setting, LLMNR will be disabled on all available network adapters on the DNS client. If you disable this policy setting, or you do not configure this policy setting, LLMNR will be enabled on all available network adapters.
848e1fa7499e Turn_Off_Multicast Registry
Copy registry mappings
HKLM\Software\Policies\Microsoft\Windows NT\DNSClient\EnableMulticast (enabled) = 0
HKLM\Software\Policies\Microsoft\Windows NT\DNSClient\EnableMulticast (disabled) = 1Policy notes
Specifies that link local multicast name resolution (LLMNR) is disabled on the DNS client. LLMNR is a secondary name resolution protocol. With LLMNR, queries are sent using multicast over a local network link on a single subnet from a DNS client to another DNS client on the same subnet that also has LLMNR enabled. LLMNR does not require a DNS server or DNS client configuration, and provides name resolution in scenarios in which conventional DNS name resolution is not possible. If you enable this policy setting, LLMNR will be disabled on all available network adapters on the DNS client. If you disable this policy setting, or you do not configure this policy setting, LLMNR will be enabled on all available network adapters.