Adaptive-Techniques.net

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HTTP
1xx – Informational

These status codes indicate a provisional response. The client should be prepared to receive one or more 1xx responses before receiving a regular response.

• 100 – Continue.
• 101 – Switching protocols.

2xx – Success

This class of status codes indicates that the server successfully accepted the client request.

• 200 – OK. The client request has succeeded.
• 201 – Created.
• 202 – Accepted.
• 203 – Non-authoritative information.
• 204 – No content.
• 205 – Reset content.
• 206 – Partial content.

3xx – Redirection

The client browser must take more action to fulfill the request. For example, the browser may have to request a different page on the server or repeat the request by using a proxy server.

• 301 – Moved Permanently
• 302 – Object moved.
• 304 – Not modified.
• 307 – Temporary redirect.

4xx – Client Error

An error occurs, and the client appears to be at fault. For example, the client may request a page that does not exist, or the client may not provide valid authentication information.

• 400 – Bad request.
• 401 – Access denied. IIS defines a number of different 401 errors that indicate a more specific cause of the error. These specific error codes are displayed in the browser but are not displayed in the IIS log:
• 401.1 – Logon failed.
• 401.2 – Logon failed due to server configuration.
• 401.3 – Unauthorized due to ACL on resource.
• 401.4 – Authorization failed by filter.
• 401.5 – Authorization failed by ISAPI/CGI application.
• 401.7 – Access denied by URL authorization policy on the Web server. This error code is specific to IIS 6.0.
• 403 – Forbidden. IIS defines a number of different 403 errors that indicate a more specific cause of the error:
• 403.1 – Execute access forbidden.
• 403.2 – Read access forbidden.
• 403.3 – Write access forbidden.
• 403.4 – SSL required.
• 403.5 – SSL 128 required.
• 403.6 – IP address rejected.
• 403.7 – Client certificate required.
• 403.8 – Site access denied.
• 403.9 – Too many users.
• 403.10 – Invalid configuration.
• 403.11 – Password change.
• 403.12 – Mapper denied access.
• 403.13 – Client certificate revoked.
• 403.14 – Directory listing denied.
• 403.15 – Client Access Licenses exceeded.
• 403.16 – Client certificate is untrusted or invalid.
• 403.17 – Client certificate has expired or is not yet valid.
• 403.18 – Cannot execute requested URL in the current application pool. This error code is specific to IIS 6.0.
• 403.19 – Cannot execute CGIs for the client in this application pool. This error code is specific to IIS 6.0.
• 403.20 – Passport logon failed. This error code is specific to IIS 6.0.
• 404 – Not found.
• 404.0 – (None) File or directory not found.
• 404.1 – Web site not accessible on the requested port.
• 404.2 – Web service extension lockdown policy prevents this request.
• 404.3 – MIME map policy prevents this request.
• 405 – HTTP verb used to access this page is not allowed (method not allowed.)
• 406 – Client browser does not accept the MIME type of the requested page.
• 407 – Proxy authentication required.
• 412 – Precondition failed.
• 413 – Request entity too large.
• 414 – Request-URI too long.
• 415 – Unsupported media type.
• 416 – Requested range not satisfiable.
• 417 – Execution failed.
• 423 – Locked error.

5xx – Server Error

The server cannot complete the request because it encounters an error.

• 500 – Internal server error.
• 500.12 – Application is busy restarting on the Web server.
• 500.13 – Web server is too busy.
• 500.15 – Direct requests for Global.asa are not allowed.
• 500.16 – UNC authorization credentials incorrect. This error code is specific to IIS 6.0.
• 500.18 – URL authorization store cannot be opened. This error code is specific to IIS 6.0.
• 500.100 – Internal ASP error.
• 501 – Header values specify a configuration that is not implemented.
• 502 – Web server received an invalid response while acting as a gateway or proxy.
• 502.1 – CGI application timeout.
• 502.2 – Error in CGI application.
• 503 – Service unavailable. This error code is specific to IIS 6.0.
• 504 – Gateway timeout.
• 505 – HTTP version not supported.