IIS SubStatus Codes

  IIS 7 404子状态代码清单：

Status	Description
404.1	Site could not be found
404.2	Denied by Policy. The request ISAPI or CGI program is not allowed in the Restriction List.
404.3	The static file handler did not have the file in its MimeMap and therefore rejected the request.
404.4	No handler was found to serve the request.
404.5	The Request Filtering Module rejected an URL sequence in the request.
404.6	The Request Filtering Module denied the HTTP verb of the request.
404.7	The Request Filtering module rejected the file extension of the request.
404.8	The Request Filtering module rejected a particular URL segment (characters between two slashes).
404.9	IIS rejected to serve a hidden file.
404.1	The Request Filtering module rejected a header that was too long.
404.11	The Request Filtering module rejected a request that was double escaped.
404.12	The Request Filtering module rejected a request that contained high bit characters.
404.13	The Request Filtering module rejected a request that was too long (request + entity body).
404.14	The Request Filtering module rejected a request with a URL that was too long.
404.15	The Request Filtering module rejected a request with a too long query string.