Turn off Multicast Name Resolution Local Link Multicast Name Resolution (LLMNR) is a secondary name resolution protocol. Queries are sent over the Local Link, a single subnet, from a client machine using Multicast to which another client on the same link, which also has LLMNR enabled, can respond. LLMNR provides name resolution in scenarios in which conventional DNS name resolution is not possible. If you enable this policy setting, Multicast name resolution or LLMNR, will be turned off for the machine across all available but un-configured network adapters. If you disable this policy setting, Multicast name resolution or LLMNR, will be turned on for the machine across all available but un-configured network adapters. If you do not configure this policy setting, Multicast name resolution or LLMNR, will be turned on for the machine across all available but un-configured network adapters by default.

[enable/disable]

(1) GPO: Computer ConfigurationAdministrative TemplatesNetworkDNS Client!Turn off Multicast Name Resolution (2) REG: HKEY_LOCAL_MACHINESoftwarePoliciesMicrosoftWindows NTDNSClient!EnableMulticast