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Disable Win2K DNS Negative Caching

Jun. 23, 2003 Readers | Windows IT Pro

Windows 2000 DNS includes a caching resolver, which enables negative caching by default. In some cases, a user might not be able to access a system, shared resource, or Web page because Win2K added the negative (i.e., unsuccessful) DNS lookup to its negative caching. To prevent such a problem, you can disable negative caching.

Start regedit and go to the HKEY_LOCAL_MACHINES\SYSTEM\CurrentControlSet\Services\DNSCache\Parameters registry subkey. Set the value of NegativeCacheTime to 0 (the default value is 300 seconds).

—Fritz F. Saad
Fritz_Saad@hotmail.com

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