Configuring Internal DNS Server when Using Microsoft Proxy Server

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If you are using Microsoft Windows NT DNS servers on your intranet and also have external DNS Servers, you will need to change the configuration of the internal DNS servers to turn off recursive forwarding for DNS searches. To turn off recursive forwarding on the Windows NT DNS servers, use the following steps:

WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

For information about how to edit the registry, view the "Changing Keys And Values" Help topic in Registry Editor (Regedit.exe) or the "Add and Delete Information in the Registry" and "Edit Registry Data" Help topics in Regedt32.exe. Note that you should back up the registry before you edit it.

1. Start Registry Editor (Regedt32.exe or Regedit.exe).
2. Go to the following subkey:
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DNS\Paramete
3. Create the NoRecursion value using the following information:
   Value : NoRecursion Data Type: REG_DWORD Data : 0
4. Exit Registry Editor and restart the Domain Name Service.

The NoRecursion registry value prevents your local DNS server from blocking further attempts to resolve a request for host name resolution. This allows DNS searches to continue trying other secondary DNS Servers specified in the search list.

If your internal DNS server uses a platform other than Microsoft Windows NT Server version 4.0, such as a UNIX-based DNS server that uses the BIND service, refer to your server's documentation on how to turn off recursive forwarding.