Data type Range Default value
REG_DWORD 0 | 1 0


Determines whether the DNS server performs recursive resolution in accordance with the NoResolution bit in the DNS name query packet header.

Value Meaning
0 The DNS server acts in accordance with the NoRecursion bit set in the packet header.
1 The DNS server does not perform recursive resolution regardless of the setting of the NoResolution bit in the packet header.

You might consider changing the NoRecursion value if clients are limited to the names on a server, such as within an intranet, or when the server is not capable of resolving external names.

Change method

To change the value of this entry, use the DNS console. Right-click the server name, click Properties, click the Advanced tab. This entry corresponds to the Disable Recursion option. Or, use Dnscmd.exe, a tool included with the Windows 2000 Support Tools. Using either method, your changes are effective immediately; you do not have to restart the DNS server.

Do not change this value by editing the registry.

Activation method

DNS reads its registry entries only when it starts. You can change entries while the DNS server is running by using the DNS console or Dnscmd.exe. If you change entries by editing the registry, the changes are not effective until you restart the DNS server.

Note Image Note

If you start DNS by using a standard BIND file, the value of NoRecursion in the BIND file takes precedence over the value of this registry entry. The entry might be deleted or its value replaced by the value in the BIND file.