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The Apache web server returns 403 Forbidden in response to requests for URL [3] paths that corresponded to file system directories when directory listings have been disabled in the server and there is no Directory Index directive to specify an existing file to be returned to the browser
403 Forbidden The request contained valid data and was understood by the server, but the server is refusing action. This may be due to the user not having the necessary permissions for a resource or needing an account of some sort, or attempting a prohibited action (e.g. creating a duplicate record where only one is allowed).
If a web server responds with Cache-Control: no-cache then a web browser or other caching system (intermediate proxies) must not use the response to satisfy subsequent requests without first checking with the originating server (this process is called validation). This header field is part of HTTP version 1.1, and is ignored by some caches and ...
Under HTTP 1.0, connections should always be closed by the server after sending the response. [1]Since at least late 1995, [2] developers of popular products (browsers, web servers, etc.) using HTTP/1.0, started to add an unofficial extension (to the protocol) named "keep-alive" in order to allow the reuse of a connection for multiple requests/responses.
The status code 418 is sometimes returned by servers when blocking a request, instead of the more appropriate 403 Forbidden, [21] or 404 Not Found. [22] Around the time of the 2022 Russian invasion of Ukraine, the Russian military website mil.ru returned the HTTP 418 status code when accessed from outside of Russia as a DDoS attack protection ...
The designation of the 402 status implies that a payment is mandated to obtain a particular resource or service. However, its tentative status indicates limited mainstream adoption. Web developers and institutions are advised to adhere to recognized HTTP norms and employ stable, thoroughly documented status codes.
uBlock Origin (/ ˈ j uː b l ɒ k / YOO-blok [5]) is a free and open-source browser extension for content filtering, including ad blocking.The extension is available for Firefox and Chromium-based browsers (such as Chrome, Edge, Brave, and Opera).
A server uses it to deliver to the client (e.g. a web browser) a set of hashes of public keys that must appear in the certificate chain of future connections to the same domain name. For example, attackers might compromise a certificate authority, and then mis-issue certificates for a web origin. To combat this risk, the HTTPS web server serves ...