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.
Source of Information : Wrox Professional IIS 7
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.
Source of Information : Wrox Professional IIS 7
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