Turn off smart multi-homed name resolution in Windows


Sensible multi-homed identify resolution is a DNS linked feature that Microsoft released in Windows eight and carried out in Windows ten as well.

The feature is intended to pace up DNS resolution on a product managing Windows eight or newer by sending DNS requests throughout all available community adapters. Microsoft refined the feature in Windows ten as it selects the details that is returned the speediest instantly.

When the feature can make feeling from a general performance stage of look at, it introduces an challenge from a privateness one.

If you link to a VPN community on a Windows device for occasion, wise multi-homed identify resolution might lead to DNS leakage. Because requests are despatched out to all community adapters at the exact time, all configured DNS servers acquire the requests and with them details on the internet sites that you take a look at.

Flip off wise multi-homed identify resolution in Windows

Microsoft released a Registry vital and coverage to manage the feature in Windows eight.

Registry (Windows eight.x only)

Observe: manipulating the Registry might lead to troubles if done incorrectly. It is suggested that you create a backup of the Windows Registry prior to you proceed. This can be done by deciding on a Registry Hive in the Registry Editor, and then File > Export from the menu bar.

  1. Open the Windows Registry Editor. One uncomplicated selection to do that is to faucet on the Windows-vital, form regedit.exe, and strike the Enter-vital.  Windows throws an UAC prompt which you will need to affirm.
  2. Go to HKEY_Nearby_MACHINESoftwarePoliciesMicrosoftWindows NTDNSClient
  3. If the Dword worth DisableSmartNameResolution exists already, make sure it is set to one.
  4. If it does not exist, appropriate-simply click on DNSClient, and find New > Dword (32-little bit) Benefit from the menu.
  5. Identify it DisableSmartNameResolution.
  6. Set its worth to one. You might convert the feature again on at any time by location the worth to , or by deleting the Dword worth.
  7. Go to HKEY_Nearby_MACHINESYSTEMCurrentControlSetServicesDnscacheParameters
  8. If the Dword worth DisableParallelAandAAAA  exists already, make sure its worth is set to one.
  9. If the worth does not exist, appropriate-simply click on Parameters, and find New > Dword (32-little bit) Benefit.
  10. Identify it DisableParallelAandAAAA.
  11. Set the worth of the Dword to one. You can convert the feature again on by location the worth to , or by deleting the worth.

I have created a Registry file that can make both of those alterations to the Windows Registry when executed. You can down load it with a simply click on the next hyperlink:

Team Policy (Windows eight and Windows ten)

turn-off-smart-multi-homed-name-resolution Turn off smart multi-homed name resolution in Windows

The Registry vital that worked less than Windows eight does not feel to perform less than Windows ten any longer. Windows ten consumers and admins might set a coverage nonetheless to convert the feature off.

Specifies that a multi-homed DNS consumer should optimize identify resolution throughout networks. The location increases general performance by issuing parallel DNS, hyperlink neighborhood multicast identify resolution (LLMNR) and NetBIOS around TCP/IP (NetBT) queries throughout all networks. In the event that many optimistic responses are received, the community binding order is made use of to identify which reaction to acknowledge.

Observe that the Team Policy Editor is only available in skilled editions of Windows ten. Windows ten Household consumers might want to verify out Policy As well as that introduces coverage modifying to Household editions of Windows ten.

  1. Do the next to open up the Team Policy Editor in Windows: Tap on the Windows-vital on the keyboard, form gpedit.msc, and strike the Enter-vital on the keyboard.
  2. Go to Pc Configuration > Administrative Templates > Community > DNS Shopper > Flip off wise multi-homed identify resolution.
  3. Set the coverage to enabled, to disable the wise multi-homed identify resolution feature of the procedure.

If you allow this coverage location, the DNS consumer will not complete any optimizations. DNS queries will be issued throughout all networks very first. LLMNR queries will be issued if the DNS queries fail, adopted by NetBT queries if LLMNR queries fail.

Closing Phrases

Some DNS customers that you might operate on Windows machines occur with DNS leak defense to avert these leaks. OpenDNS consumers might allow the block-outside the house-dns selection for occasion in the consumer to do so.

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