Sunday, February 1, 2009

AutoCacheUpdate registry key

This registry key determines whether to update dns cahe root hints when the dns server starts.

By Default, dns server update dns cache files based on the responses received for NS and A records.

Key Name: AutoCacheUpdate
Type: DWORD (Boolean)
Default: NoKey (does automatic cache update)
Functionality: Determine whether server attempts to update cache entries using data from root servers.
Location: "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DNS\Parameters"

If the reg key is zero, then the DNS server disables cache update.

To disable auto cache updates, do the following

reg add
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DNS\Parameters /v AutoUpdateCache 0

If the AutoCacheUpdate key does NOT exist or is nonzero
, then the server will update the cache file based on the responses received for root hint queries on start up.

Note: This reg key applies only on window 2000 or earlier versions.


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