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  2. .htaccess - Wikipedia

    en.wikipedia.org/wiki/.htaccess

    A .htaccess file is often used to specify security restrictions for a directory, hence the filename "access". The .htaccess file is often accompanied by a .htpasswd file which stores valid usernames and their passwords. [5] URL rewriting Servers often use .htaccess for rewriting long, overly comprehensive URLs to shorter and more memorable ones.

  3. HTTP 404 - Wikipedia

    en.wikipedia.org/wiki/HTTP_404

    The practice of employing fake 404 errors as a means to conceal censorship has also been reported in Thailand [7] and Tunisia. [8] In Tunisia, where censorship was severe before the 2011 revolution, people became aware of the nature of the fake 404 errors and created an imaginary character named "Ammar 404" who represents "the invisible censor ...

  4. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    This class of status code indicates the client must take additional action to complete the request. Many of these status codes are used in URL redirection. [2]A user agent may carry out the additional action with no user interaction only if the method used in the second request is GET or HEAD.

  5. URL redirection - Wikipedia

    en.wikipedia.org/wiki/URL_redirection

    A redirect service is an information management system, which provides an internet link that redirects users to the desired content. The typical benefit to the user is the use of a memorable domain name, and a reduction in the length of the URL or web address.

  6. HTTP 301 - Wikipedia

    en.wikipedia.org/wiki/HTTP_301

    Multiple Redirects: Using multiple 301 redirects in succession (A to B, then B to C) can lead to increased page load times and may dilute SEO value. Mixed Content Issues : When redirecting from HTTP to HTTPS, ensure that all resources (images, scripts, stylesheets) on the page are also loaded over HTTPS to prevent mixed content warnings.

  7. HTTP 403 - Wikipedia

    en.wikipedia.org/wiki/HTTP_403

    A 403 status code can occur for the following reasons: [3] Insufficient permissions: The most common reason for a 403 status code is that the user lacks the necessary permissions to access the requested resource.

  8. Typosquatting - Wikipedia

    en.wikipedia.org/wiki/Typosquatting

    Later, the URL was redirected to google.com; [5] a 2018 check revealed it to redirect users to adware pages, and a 2020 attempt to access the site through a private DNS resolver hosted by AdGuard resulted in the page being identified as malware and blocked for the user's security. By mid-2022, it had been turned into a political blog.

  9. Internet Control Message Protocol - Wikipedia

    en.wikipedia.org/wiki/Internet_Control_Message...

    The ICMP header starts after the IPv4 header and is identified by its protocol number, 1. [6] All ICMP packets have an eight-byte header and variable-sized data section. The first four bytes of the header have fixed format, while the last four bytes depend on the type and code of the ICMP packet.