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HTTP Status Code

For each request, webserver returns http status code. This codes depicts how a request was responded by server to the client.

It also helps in troubleshooting any problem with the website or its supporting infrastructure.

HTTP Status Code List:

  • 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 –      Forbidden. IIS defines several 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.

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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