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Article ID: 247643 - Last Review: December 3, 2007 - Revision: 2.5

HTTP/1.1 Error 501 - Not Implemented

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This article was previously published under Q247643
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SYMPTOMS

When you attempt to use an unknown method from an Internet client, the following error message occurs:
HTTP/1.1 501 Not Implemented
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CAUSE

This behavior is by design. Internet Information Services (IIS) only supports the methods defined in "RFC 2616 - Hypertext Transfer Protocol -- HTTP/1.1" and "RFC 2518 - HTTP Extensions for Distributed Authoring -- WEBDAV." The methods are listed in the following table:
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MethodProtocolRFCSection
CONNECTHTTP26169.9
COPYWEBDAV25188.8
DELETEHTTP26169.7
GETHTTP26169.3
HEADHTTP26169.4
LOCKWEBDAV25188.10
MKCOLWEBDAV25188.1
MOVEWEBDAV25188.9
OPTIONSHTTP26169.2
POSTHTTP26169.5
PROPFINDWEBDAV25188.1
PROPPATCHWEBDAV25188.2
PUTHTTP26169.6
TRACEHTTP26169.8
UNLOCKWEBDAV25188.11
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MORE INFORMATION

For more information on these topics, please see the information at the following:
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APPLIES TO
  • Microsoft Internet Information Services 6.0
  • Microsoft Internet Information Services 5.0
  • Microsoft Internet Information Services 7.0
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Keywords: 
kbhttp501 kbnofix kbprb kbprod2web KB247643
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