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IP restrictions: The server may also restrict access to specific IP addresses or IP ranges. If the user's IP address is not included in the list of permitted addresses, a 403 status code is returned. Server configuration: The server's configuration can be set to prohibit access to certain files, directories, or areas of the website.
[19] [20] [21] Sometimes, this status code is also used as a response to a blocked request, instead of the more appropriate 403 Forbidden. [22] [23] 421 Misdirected Request The request was directed at a server that is not able to produce a response (for example because of connection reuse). 422 Unprocessable Content
The domain name of the server (for virtual hosting), and the TCP port number on which the server is listening. The port number may be omitted if the port is the standard port for the service requested. Mandatory since HTTP/1.1. [17] If the request is generated directly in HTTP/2, it should not be used. [18]
The Digital Audio Access Protocol (DAAP) is the proprietary protocol introduced by Apple in its iTunes software to share media across a local network.. DAAP addresses the same problems for Apple as the UPnP AV standards address for members of the Digital Living Network Alliance (DLNA).
Development of HTTP was initiated by Tim Berners-Lee at CERN in 1989 and summarized in a simple document describing the behavior of a client and a server using the first HTTP version, named 0.9. [2] That version was subsequently developed, eventually becoming the public 1.0. [3]
403 Forbidden The server understood the request, but is refusing to fulfill it. [1]: §21.4.4 Sometimes (but not always) this means the call has been rejected by the receiver. 404 Not Found The server has definitive information that the user does not exist at the domain specified in the Request-URI.
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While both codes indicate that access to a resource is restricted, the distinction lies in the reason for the restriction. The 402 code specifically implies that payment is required, whereas the 403 code implies that access is forbidden due to other reasons, such as insufficient permissions or authentication failure.