Err Msg: HTTP/1.1 501 Not Supported (234923)


The information in this article applies to:

  • Microsoft Internet Information Services 5.0
  • Microsoft Internet Information Server 4.0
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.
Modification Type:MinorLast Reviewed:6/23/2005
Keywords:kbhttp501 kbpending kbprb kbProd2Web KB234923
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