HTTP/1.1 Error 501 - Not Implemented (247643)
The information in this article applies to:
- Microsoft Internet Information Services version 6.0
- Microsoft Internet Information Services 5.0
This article was previously published under Q247643 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:
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| 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 |
| Modification Type: | Minor | Last Reviewed: | 4/22/2003 |
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| Keywords: | kbhttp501 kbnofix kbprb kbProd2Web KB247643 |
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