Http404, http403 Error

· 400-Incorrect request.
· 401-Access denied. IIS defines many different 401 errors, which indicate more specific error causes. These specific error codes are displayed in the browser but not in the IIS log: · 401. 1-Logon Failed.
· 401-login failed due to server configuration.
· 401-unauthorized access to resources due to ACL restrictions.
· 401-filter authorization failed.
· 401-An error occurred while authorizing the ISAPI/cgi application.
· 401-access is rejected by the URL Authorization Policy on the Web server. This error code is dedicated to IIS 6.0.

· 403-forbidden access: IIS defines many different 403 errors, which indicate a more specific cause of the error: · 403. 1-the execution access is forbidden.
· 403-Read access is forbidden.
· 403-write access is forbidden.
· 403-require SSL.
· 403. 5-require SSL 128.
· 403-the IP address is rejected.
· 403-client certificate required.
· 403-site access is rejected.
· 403-too many users.
· 403-the configuration is invalid.
· 403-password change.
· 403-access to the ing table is denied.
· 403-client certificate revoked.
· 403-reject the directory list.
· 403-exceeds the client access permission.
· 403-the client certificate is untrusted or invalid.
· 403-the client certificate has expired or has not yet taken effect.
· 403-the requested URL cannot be executed in the current application pool. This error code is dedicated to IIS 6.0.
· 403. 19-CGI cannot be executed for clients in the application pool. This error code is dedicated to IIS 6.0.
· 403. 20-logon to passport failed. This error code is dedicated to IIS 6.0.

· 404-not found. · 404. 0-(none)-No file or directory found.
· 404-unable to access the web site on the requested port.
· 404-the Web service extended locking policy blocks this request.
· 404-the mime ing policy blocks this request.

· 405-HTTP predicates used to access this page are not allowed (methods are not allowed)
· 406-the client browser does not accept the MIME type of the requested page.
· 407-proxy authentication is required.
· 412-precondition failed.
· 413-The Request Entity is too large.
· 414-the request URI is too long.
· 415-unsupported media type.
· 416-the requested range cannot be met.
· 417-execution failed.
· 423-locking error.