HTTP Error Codes and Their Meaning
While surfing the net we always get some HTTP Errors. These Error codes are crucial for troubleshooting various issues. You can see these error codes in various logs. If you can interpret the correct meaning of the http error code, you can decide the places to look at for resolving this issue.
So here are they. All the error codes with their meaning. Hope this will help a lot many of you.
The client should be prepared to receive one or more 1xx responses before receiving a regular response.
2xx - Success
This class of status codes indicates that the server successfully accepted the client request.
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.
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 several 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:
5xx - Server Error
The server cannot complete the request because it encounters an error.
500 - Internal server error.
While surfing the net we always get some HTTP Errors. These Error codes are crucial for troubleshooting various issues. You can see these error codes in various logs. If you can interpret the correct meaning of the http error code, you can decide the places to look at for resolving this issue.
So here are they. All the error codes with their meaning. Hope this will help a lot many of you.
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.
- 207 - Multi-Status (WebDay).
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 several 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.
- 403.1 - 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.
- 404.0 - (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.
- 500.19 - Data for this file is configured improperly in the metabase.
- 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.
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