Microsoft KB Archive/272596

= IIS: Enabling HTTP Compression Returns Content with January 1, 1997 Expiration Date =

Article ID: 272596

Article Last Modified on 11/21/2006

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APPLIES TO


 * Microsoft Internet Information Services 5.0

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This article was previously published under Q272596



SYMPTOMS
After you enable HTTP compression on a Microsoft Windows 2000 Server that is running Internet Information Services (IIS) version 5.0, all compressed content is returned with an expiration date of January 1, 1997.



CAUSE
All compressed content is set to expire in the past to prevent proxy servers from caching the content and returning compressed content to a client that does not understand HTTP compression.



MORE INFORMATION
For more information, see the &quot;About Capacity Planning&quot; and &quot;Enabling HTTP Compression&quot; in the online documentation for IIS 5.0 on a Windows 2000 server at the following sites:

http://localhost/iishelp/iis/htm/core/iiprftn.htm

http://iisteam/iishelp/iis/htm/core/iihttpc.htm

For additional information about HTTP compression, click the article numbers below to view the articles in the Microsoft Knowledge Base:

259760 Compression Is Not Enabled on POST Request

234497 How to Specify Additional Document Types for HTTP Compression

241428 HTTP Compression Does Not Compress Office Documents

255951 HTTP Compression Methods and Files Used by IIS 5.0

255801 How to Determine if HTTP Compression Is in Use

255844 Default Document Is Not Compressed When Compression Is Enabled

258721 HTTP Compression Will Not Work with URLs that Include a Forward Slash &quot;/&quot;

Keywords: kbprb kbpending KB272596

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