Sunday, January 25, 2009

NoRecursion registry key

The registry key determines whether to perform recursive resolution for a dns query in which RecursionDesired bit is set.

The registry key is located at HKLM\SYSTEM\CurrentControlSet\Services\DNS\Parameters

Name: NoRecursion
Values : 0, 1
Default value : 0

Value 0: The DNS server perform recursion only if the RecursionDesired bit set to 1 in the DNS query packet.

value 1: The DNS server won't perform recursive resolution irrespective of the value of RecursionDesired bit in the DNS query packet header.

1. This entry does not exist in the registry by default. One need to create it.

2. If DNS starts by using standard BIND file, then the BIND file RecursionDesired bit is used instead of value of this registry entry.


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