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  2. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    404 Not Found The requested resource could not be found but may be available in the future. Subsequent requests by the client are permissible. 405 Method Not Allowed A request method is not supported for the requested resource; for example, a GET request on a form that requires data to be presented via POST, or a PUT request on a read-only ...

  3. HTTP 404 - Wikipedia

    en.wikipedia.org/wiki/HTTP_404

    Microsoft's IIS 7.0, IIS 7.5, and IIS 8.0 servers define the following HTTP substatus codes to indicate a more specific cause of a 404 error: 404.0 – Not found. 404.1 – Site Not Found. 404.2 – ISAPI or CGI restriction. 404.3 – MIME type restriction. 404.4 – No handler configured. 404.5 – Denied by request filtering configuration.

  4. List of HTTP header fields - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_header_fields

    The header field Cache-Control: no-store is intended to instruct a browser application to make a best effort not to write it to disk (i.e not to cache it). The request that a resource should not be cached is no guarantee that it will not be written to disk. In particular, the HTTP/1.1 definition draws a distinction between history stores and ...

  5. HTTP - Wikipedia

    en.wikipedia.org/wiki/HTTP

    In HTTP/1.0 and since, the first line of the HTTP response is called the status line and includes a numeric status code (such as "404") and a textual reason phrase (such as "Not Found"). The response status code is a three-digit integer code representing the result of the server's attempt to understand and satisfy the client's corresponding ...

  6. HTTP referer - Wikipedia

    en.wikipedia.org/wiki/HTTP_referer

    In HTTP, "Referer" (a misspelling of "Referrer" [1]) is an optional HTTP header field that identifies the address of the web page (i.e., the URI or IRI) from which the resource has been requested.

  7. 400 (number) - Wikipedia

    en.wikipedia.org/wiki/400_(number)

    The HTTP 404 status code is usually sent from a web page if a user attempts to reach a broken or dead link. It's since become one of the most commonly reached, and thus most recognizable errors on the World Wide Web. [8] Section 404 of the Sarbanes–Oxley Act. One of the three area codes of the Atlanta calling area.

  8. Operation 404 - Wikipedia

    en.wikipedia.org/wiki/Operation_404

    The operation was named after HTTP 404, which indicates the web page cannot be found, symbolizes the objective of making illegal content unavailable on the internet. [2] The operation involved the blocking and seizure of piracy websites, IPTV services, applications, and social media accounts. [ 3 ]

  9. X-Forwarded-For - Wikipedia

    en.wikipedia.org/wiki/X-Forwarded-For

    The general format of the field is: [2] X-Forwarded-For: client, proxy1, proxy2 where the value is a comma+space separated list of IP addresses, the left-most being the original client, and each successive proxy that passed the request adding the IP address where it received the request from.