401 The requested resource requires user authentication.(aUTHORIZATION REQUIRED-CHECK .htaccess
403 The server understood the request, but is refusing to fulfill it.(Forbidden, check permissions)
404 The server has not found anything matching the requested URI (Uniform Resource Identifier).
Is the virtualHost getting to the proper directory?
500 The server encountered an unexpected condition that prevented it from fulfilling the request
(Internal server error)
505 The server does not support, or refuses to support, the HTTP protocol version that was used in the
request message.(Http Version not supported)
550NO LOCAL GATEWAY/GATEMAIL OUTGOING SERVER REQUIRES AUTHENTICATION(OUTLOOK"IMAIL")
8383IMAIL for Web browsers(http://mail.domainname.com 8383
8484 Web Calendaring(Vulnerable protocol)
100 The request can be continued.
101 The server has switched protocols in an upgrade header.
200 The request completed successfully.(Not an error, everything is okay)
201 The request has been fulfilled and resulted in the creation of a new resource.
202 The request has been accepted for processing, but the processing has not been completed.
203 The returned meta information in the entity-header is not the definitive set available from the origin server.
204 The server has fulfilled the request, but there is no new information to send back.
205 The request has been completed, and the client program should reset the document view that caused the request to be sent to allow the user to easily initiate another input action.
206 The server has fulfilled the partial GET request for the resource.
300 The server couldn't decide what to return.
301 The requested resource has been assigned to a new permanent URI (Uniform Resource Identifier), and any future references to this resource should be done using one of the returned URIs.
302 The requested resource resides temporarily under a different URI (Uniform Resource Identifier).
303 The response to the request can be found under a different URI (Uniform Resource Identifier) and should be retrieved using a GET HTTP verb on that resource.
304 The requested resource has not been modified.
305 The requested resource must be accessed through the proxy given by the location field.
307 The redirected request keeps the same HTTP verb. HTTP/1.1 behavior.
400 The request could not be processed by the server due to invalid syntax.
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 The HTTP verb used is not allowed.
406 No responses acceptable to the client were found.
407 Proxy authentication required.
408 The server timed out waiting for the request.
409 The request could not be completed due to a conflict with the current state of the resource. The user should resubmit with more information.
410 The requested resource is no longer available at the server, and no forwarding address is known.
411 The server refuses to accept the request without a defined content length.
412 The precondition given in one or more of the request header fields evaluated to false when it was tested on the server.
413 The server is refusing to process a request because the request entity is larger than the server is willing or able to process.
414 The server is refusing to service the request because the request URI (Uniform Resource Identifier) is longer than the server is
willing to interpret.
415 The server is refusing to service the request because the entity of the request is in a format not supported by the requested resource for
the requested method.
449 The request should be retried after doing the appropriate action.
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 The server does not support the functionality required to fulfill the request.
502 The server, while acting as a gateway or proxy, received an invalid response from the upstream server it accessed in
attempting to fulfill the request.
502.1 - CGI application timeout.
502.2 - Error in CGI application.
503 The service is temporarily overloaded.
504 The request was timed out waiting for a gateway.