DOCUMENT:Q247643  31-JUL-2001  [iis]
TITLE   :HTTP/1.1 Error 501 - Not Implemented
PRODUCT :Internet Information Server
PROD/VER:winnt:5.0
OPER/SYS:
KEYWORDS:kbOSWin2000 kbiis500prod2web kbhttp501 kbProd2Web

======================================================================
-------------------------------------------------------------------------------
The information in this article applies to:

 - Microsoft Internet Information Services version 5.0 
-------------------------------------------------------------------------------

SYMPTOMS
========

When you attempt to use an unknown method from an Internet client, the following
error message occurs:

   HTTP/1.1 501 Not Implemented

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:

   
   +---------------------------------------+
   | Method    | Protocol | RFC  | Section | 
   +---------------------------------------+
   | CONNECT   | HTTP     | 2616 | 9.9     | 
   +---------------------------------------+
   | COPY      | WEBDAV   | 2518 | 8.8     | 
   +---------------------------------------+
   | DELETE    | HTTP     | 2616 | 9.7     | 
   +---------------------------------------+
   | GET       | HTTP     | 2616 | 9.3     | 
   +---------------------------------------+
   | HEAD      | HTTP     | 2616 | 9.4     | 
   +---------------------------------------+
   | LOCK      | WEBDAV   | 2518 | 8.10    | 
   +---------------------------------------+
   | MKCOL     | WEBDAV   | 2518 | 8.1     | 
   +---------------------------------------+
   | MOVE      | WEBDAV   | 2518 | 8.9     | 
   +---------------------------------------+
   | OPTIONS   | HTTP     | 2616 | 9.2     | 
   +---------------------------------------+
   | POST      | HTTP     | 2616 | 9.5     | 
   +---------------------------------------+
   | PROPFIND  | WEBDAV   | 2518 | 8.1     | 
   +---------------------------------------+
   | PROPPATCH | WEBDAV   | 2518 | 8.2     | 
   +---------------------------------------+
   | PUT       | HTTP     | 2616 | 9.6     | 
   +---------------------------------------+
   | TRACE     | HTTP     | 2616 | 9.8     | 
   +---------------------------------------+
   | UNLOCK    | WEBDAV   | 2518 | 8.11    | 
   +---------------------------------------+

MORE INFORMATION
================

For more information on these topics, please see the information at the
following:

 - RFC 2616 - Hypertext Transfer Protocol -- HTTP/1.1
 - RFC 2518 - HTTP Extensions for Distributed Authoring -- WEBDAV

Additional query words: prod2web

======================================================================
Keywords          : kbOSWin2000 kbiis500prod2web kbhttp501 kbProd2Web 
Technology        : kbiisSearch kbiis500
Version           : winnt:5.0
Issue type        : kbprb
Solution Type     : kbnofix

=============================================================================

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