Microsoft KB Archive/234923

= Err Msg: HTTP/1.1 501 Not Supported =

Article ID: 234923

Article Last Modified on 11/21/2006

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APPLIES TO


 * Microsoft Internet Information Services 5.0
 * Microsoft Internet Information Server 4.0

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This article was previously published under Q234923



We strongly recommend that all users upgrade to Microsoft Internet Information Services (IIS) version 6.0 running on Microsoft Windows Server 2003. IIS 6.0 significantly increases Web infrastructure security. For more information about IIS security-related topics, visit the following Microsoft Web site:

http://www.microsoft.com/technet/security/prodtech/IIS.mspx



SYMPTOMS
When you attempt to download a file from a server running IIS, the following error message occurs:

HTTP/1.1 501 Not Supported



CAUSE
This is by design. IIS does not serve files larger than 4 gigabytes (GB).



WORKAROUND
Individual files greater than 4 GB can often be compressed using third-party utilities to reduce the file size for downloading.

Additional query words: iis

Keywords: kbhttp501 kbpending kbprb kbprod2web KB234923

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