Host Name Resolution Does Not Work After One Year When You Use a Hosts File
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When you use a Hosts file for host name resolution on a Windows 2000-based computer, you may find that after a period of approximately one year, host names are no longer resolved to Internet Protocol (IP) addresses.
This problem may occur if you do not restart the computer during a one-year time period. The Time-to-Live (TTL) values for entries in the Hosts file are cached for one year. If you do not restart the computer at any time in a one-year time interval, the TTL values expire, and the entries in the Hosts file must be refreshed before you can use them for name resolution.
Service Pack InformationTo resolve this problem, obtain the latest service pack for Microsoft Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
260910 How to Obtain the Latest Windows 2000 Service Pack
Hotfix InformationA supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.
If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.
Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language. The global version of this fix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
Date Time Version Size File name------------------------------------------------------17-Jan-03 14:36 5.0.2195.6656 96,016 Dnsrslvr.dll
To work around this problem, restart the computer so that the TTL values for the entries in the Hosts file do not expire.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Microsoft Windows 2000 Service Pack 4.
For more information about the Hosts file, see the sample Hosts file in the SystemRoot\System32\Drivers\Etc folder.
Article ID: 812175 - Last Review: 02/27/2014 21:16:24 - Revision: 2.7
Microsoft Windows 2000 Service Pack 3, Microsoft Windows 2000 Server SP2, Microsoft Windows 2000 Server SP1, Microsoft Windows 2000 Server, Microsoft Windows 2000 Advanced Server SP3, Microsoft Windows 2000 Advanced Server SP2, Microsoft Windows 2000 Advanced Server SP1, Microsoft Windows 2000 Advanced Server, Microsoft Windows 2000 Service Pack 3, Microsoft Windows 2000 Professional SP2, Microsoft Windows 2000 Professional SP1, Microsoft Windows 2000 Professional Edition
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