Common HTTP status codes and definitions

303 refer to others-you can find the response to the request under another URI and use the GET method to retrieve the response.

Common HTTP status codes and definitions

2xx successful

200 normal; the request has been completed.
201 normal; followed by the POST command.
202 normal; accepted for processing, but not completed.
203 normal; partial information-only part of the returned information.
204 normal; no response-received request, but no information to send back.

3xx Redirection

301 Moved-the requested data has a new location and the change is permanent.
302 Found-the requested data temporarily has different URIs.
303 refer to others-you can find the response to the request under another URI and use the GET method to retrieve the response.
304 not modified-the document was not modified as expected.
305 use proxy-the requested resource must be accessed through the proxy provided in the location field.
306 not used-no longer used; keep this code for future use.

Errors in 4xx Client

400 error request-the request has a syntax problem or cannot meet the request.
401 Unauthorized-unauthorized client access to data.
402 Payment required-the billing system is in effect.
403 Forbidden-access is not required even if authorized.
404 Not Found-the server cannot find the specified resource; the document does not exist.
407 Proxy Authentication request-the client must first use proxy authentication itself.
415 the media type is not supported-the server rejects service requests because the request entity format is not supported.

5xx Server error

500 internal error-the server cannot complete the request due to exceptions.
501 not executed-the server does not support the requested tool.
502 error gateway-the server receives an invalid response from the upstream server.
503 unable to obtain services-the server cannot process requests due to temporary overload or maintenance.

More detailed status codes 4xx and 5xx

HTTP 400-invalid request
HTTP 401.1-Unauthorized: logon failed
HTTP 401.2-Unauthorized: logon fails due to server configuration problems
HTTP 401.3-ACL prohibit resource access
HTTP 401.4-Unauthorized: authorization denied by filter
HTTP 401.5-Unauthorized: ISAPI or CGI authorization failed
HTTP 403-access prohibited
HTTP 403-access to Internet Service Manager (HTML) is limited to Localhost
HTTP 403.1 prohibit access: prohibit executable access
HTTP 403.2-access prohibited: Read prohibited
HTTP 403.3-access prohibited: write access prohibited
HTTP 403.4-access prohibited: requires SSL
HTTP 403.5-access prohibited: requires SSL 128
HTTP 403.6-access prohibited: the IP address is denied
HTTP 403.7-access prohibited: Client certificate required
HTTP 403.8-access prohibited: site access prohibited
HTTP 403.9-access prohibited: too many connected users
HTTP 403.10-access prohibited: invalid configuration
HTTP 403.11-access prohibited: password change
HTTP 403.12-access prohibited: mappers reject access
HTTP 403.13-access prohibited: the client certificate has been revoked
HTTP 403.15-access prohibited: too many access permits from customers
HTTP 403.16-access prohibited: the client certificate is untrusted or invalid
HTTP 403.17-access prohibited: the client certificate has expired or has not yet taken effect
HTTP 404.1-the Web site cannot be found
HTTP 404-file not found
HTTP 405-the resource is forbidden
HTTP 406-unacceptable
HTTP 407-Proxy Authentication Required
HTTP 410-never available
HTTP 412-Precondition Failed
HTTP 414-request-URI is too long
HTTP 500-Internal Server Error
HTTP 500.100-Internal Server Error-ASP error
HTTP 500-11 server disabled
HTTP 500-12 application restart
HTTP 500-13-the server is too busy
HTTP 500-14-invalid application
HTTP 500-15-requests to global. asa are not allowed
Error 501-not implemented
HTTP 502-gateway error