Microsoft KB Archive/171998

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Knowledge Base

Article ID: 171998

Article Last Modified on 11/1/2006


  • Microsoft Windows NT Server 4.0 Standard Edition

This article was previously published under Q171998


In DNS Manager, you may notice that "A" records randomly appear and disappear without you entering or deleting them.


This behavior occurs because your DNS zone is configured to query WINS.


These records are not a problem, but you can resolve this behavior by changing the length of time that the records appear in DNS Manager. To do this, follow these steps:

  1. From DNS Manager, right-click the zone where the entries appear.
  2. Click Properties, click WINS Lookup, and then click Advanced.
  3. Change the Cache Timeout Value to the setting that you want.
  4. Click OK, then click OK again.


When DNS resolves a query through WINS, DNS will cache the name in memory for the length of time specified in the Cache Timeout Value field under the Advanced WINS Lookup configuration of the zone properties. The records are visible from DNS Manager only, and they do not get added to the actual zone file. Only successful name queries are placed into cache. Note that in Windows 2000, the WINS Lookups that are cached no longer appear in the GUI.

Keywords: kbinfo kbnetwork KB171998