HTTP Common Errors

HTTP Error 400 400 request error The server was unable to understand the request due to a malformed syntax. Without modification, the client program cannot repeat the request. HTTP Error 401 401.1 Unauthorized: Logon Failure This error indicates that the certificate that is transmitted to the server does not match the certificate that is required to log on to the server. Contact the administrator of the WEB server to confirm that you have permission to access the requested resource. 401.2 Unauthorized: Server configuration causes logon failure This error indicates that the certificate that is transmitted to the server does not match the certificate that is required to log on to the server. This error is usually caused by not sending the correct WWW validation header field. Contact the administrator of the WEB server to confirm that you have permission to access the requested resource. 401.3 Unauthorized: This error is not authorized because of an ACL in the resource indicating that the certificate transmitted by the customer does not have access to a specific resource on the server. This resource may be a Web page or file that is listed in the address line in the client computer, or it may be another file on the server that is required to process the files that are listed in the address line in the client computer. Log the full address you are trying to access and contact the administrator of the WEB server to verify that you have access to the requested resource. 401.4 Unauthorized: Authorization service rejected by the filtering program this error indicates that the WEB server has a filter installed to verify the user connected to the server. This filter denies access to the certificate of Authenticity that is connected to this server. Log the full address you are trying to access and contact the administrator of the WEB server to verify that you have access to the requested resource. 401.5 Unauthorized: ISAPI/CGI Application Authorization Failure This error indicates that an ISAPI or CGI program has been installed in the address of the Web server that you are trying to use, and is used to authenticate the user's certificate before continuing. This program denies access to the certificate of Authenticity used to connect to the server. Log the full address that you are trying to access and contact the administrator of the Web server to confirm that you have permission to access the requested resource HTTP Error 403 403.1 prohibit: Disable access if a CGI, ISAPI, or other execution program is executed from a directory that does not allow the execution of the program, this error may be caused. If the problem persists, contact the administrator of your WEB server. 403.2 Forbidden: Prohibit read access this error can be caused if there is no default Web page available or directory browsing is not enabled for this directory, or if an attempt is made to display an HTML page residing in a directory that is marked only for execution or script permissions. If the problem persists, contact the administrator of your WEB server. 403.3 Forbidden: Write access is forbidden if you attempt to upload or modify a file in a directory that does not allow write access, this problem is caused. If the problem persists, contact the administrator of your Web server.403.4 Forbidden: SSL is required this error indicates that the Web page you are trying to access is protected by Secure Sockets Layer (SSL). To view, you must enter https://in front of the address you are trying to access to enable SSL. If the problem persists, contact the administrator of your Web server. 403.5 Forbidden: Requires SSL 128 This error message indicates that the resource you are trying to access is protected by 128-bit Secure Sockets Layer (SSL). To view this resource, you need a browser that supports this layer of SSL. Verify that your browser supports 128-bit SSL security. If supported, contact the administrator of the Web server and report the problem. 403.6 Forbidden: Deny IP address this issue can be caused if the server contains a list of IP addresses that are not allowed to access this site, and the IP address that you are using is in this list. If the problem persists, contact the administrator of your Web server. 403.7 Forbidden: User certificates are required when you try to access a resource that requires the browser to have a server-aware user Secure Sockets Layer (SSL) certificate that causes this problem. can be used to verify whether you are a legitimate user for this resource. Contact the administrator of your Web server to obtain a valid user certificate. 403.8 Forbidden: Prohibit site Access this problem can occur if the Web server does not service the request, or if you do not have permission to connect to this site. Please contact the administrator of the WEB server. 403.9 Forbidden: Too many connected users can cause this problem if the Web is too busy and cannot process your request because of heavy traffic. Please connect again later. If the problem persists, contact the administrator of your WEB server. 403.10 Forbidden: Invalid configuration There is a problem with the configuration of the Web server at this time. If the problem persists, contact the administrator of your Web server. 403.11 Forbidden: Password changed during authentication if the user enters an incorrect password, this error is caused. Please refresh the page and try again. If the problem persists, contact the administrator of your Web server. 403.12 Forbidden: The mapper denies access to the denied user certificate in an attempt to access this WEB site. Contact your site administrator to establish user certificate permissions. If necessary, you can also change the user certificate and try again. HTTP Error 404 404 The Web server could not find the file or script that you requested. Please check the URL to make sure the path is correct. If the problem persists, contact your server's administrator. HTTP Error 405 405 does not allow this method to use the method specified in the request line for the resource identified by the request. Make sure that the correct MIME type is set for the requested resource. If the problem persists, contact the server'sAdministrator contact. HTTP Error 406 406 unacceptable the resource identified by this request can only generate response entities that have a content feature that is "not acceptable" based on the "accepted" header that is sent in this request. If the problem persists, contact your server's administrator. HTTP Error 407 407 requires proxy authentication before you can service this request, you must verify this proxy server. Please log on to the proxy server and try again. If the problem persists, contact the administrator of your WEB server. HTTP Error 412 412 precondition failure when testing prerequisites on the server, the prerequisites given in the partial request header field are estimated to be false. The client places the prerequisites in the current resource Metainformation (header field data) to prevent the requested method from being misused to other resources. If the problem persists, contact the administrator of your WEB server. HTTP error 414 414 Request-uri too long request-url the server is refusing to service this request. This condition can occur only under the following conditions: The client incorrectly translates the POST request to a GET request with longer query information. The client encountered a redirection problem (for example, a redirection prefix that points to its own suffix). The server is suffering from customer interference that attempts to exploit security vulnerabilities in certain servers that use fixed-length buffers for reading or executing request-uri. If the problem persists, contact the administrator of your WEB server. HTTP Error 500 500 server Internal Error The WEB server cannot execute this request. Please retry this request later. If the problem persists, contact the administrator of your Web server. HTTP Error 501 501 the functionality required to implement this request is not implemented by the WEB server. Please check the URL for errors and if the problem persists, contact the administrator of the Web server. HTTP Error 502 502 Gateway error when used as a gateway or proxy, the server receives an invalid response from the upstream server that is accessed when it tries to implement this request. If the problem persists, contact the administrator of your Web server.

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

HTTP Common Errors