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Turn off multicast name resolution

Description:

Specifies that link local multicast name resolution (LLMNR) is disabled on client computers.

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 client computer to another client computer 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 client computer.

If you disable this policy setting, or you do not configure this policy setting, LLMNR will be enabled on all available network adapters.








Supported on:

At least Windows Vista

GPO PowerShell Regedit CMD

We can use Command Prompt to add or delete the registry key(s):


For Enabled, Add the registry key:

REG add "HKLM\Software\Policies\Microsoft\Windows NT\DNSClient" /v EnableMulticast /t REG_DWORD /d 0 /f


For Disabled, Add the registry key:

REG add "HKLM\Software\Policies\Microsoft\Windows NT\DNSClient" /v EnableMulticast /t REG_DWORD /d 1 /f


For Not Configured, Delete the registry key:

REG DELETE "HKLM\Software\Policies\Microsoft\Windows NT\DNSClient" /v EnableMulticast /f