404 File Not Found Error Page Returns
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Status codes 301 Moved Permanently 302 Found 303 See Other 403 Forbidden 404 Not Found 451 Unavailable For Legal Reasons v t e The 404 or Not Found error message is a Hypertext Transfer Protocol (HTTP) standard response code, in computer network communications, to indicate that the http error 404. the requested resource is not found. client was able to communicate with a given server, but the server could not find what
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was requested. The web site hosting server will typically generate a "404 Not Found" web page when a user attempts to follow a broken or
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dead link; hence the 404 error is one of the most recognizable errors encountered on the World Wide Web. Contents 1 Overview 2 Custom error pages 2.1 Tracking/Checking 404 errors 3 Phony 404 errors 4 404 substatus error codes defined https://support.microsoft.com/en-us/kb/248033 by IIS 4.1 Slang usage 5 See also 6 References 7 External links Overview[edit] When communicating via HTTP, a server is required to respond to a request, such as a web browser request for a web page, with a numeric response code and an optional, mandatory, or disallowed (based upon the status code) message. In the code 404, the first digit indicates a client error, such as a mistyped Uniform Resource Locator (URL). The following two digits indicate the specific error encountered. https://en.wikipedia.org/wiki/HTTP_404 HTTP's use of three-digit codes is similar to the use of such codes in earlier protocols such as FTP and NNTP. At the HTTP level, a 404 response code is followed by a human-readable "reason phrase". The HTTP specification suggests the phrase "Not Found"[1] and many web servers by default issue an HTML page that includes both the 404 code and the "Not Found" phrase. A 404 error is often returned when pages have been moved or deleted. In the first case, it is better to employ URL mapping or URL redirection by returning a 301 Moved Permanently response, which can be configured in most server configuration files, or through URL rewriting; in the second case, a 410 Gone should be returned. Because these two options require special server configuration, most websites do not make use of them. 404 errors should not be confused with DNS errors, which appear when the given URL refers to a server name that does not exist. A 404 error indicates that the server itself was found, but that the server was not able to retrieve the requested page. Custom error pages[edit] The Wikimedia 404 message Web servers can typically be configured to display a customised 404 error page, including a more natural description, the parent site's branding, and sometimes a site map, a search form or 404 page widget. The protocol level phrase, which is hidden from the user, is rarely customized. Internet Explorer, however, w
you click a link and encounter a "404 File Not Found" error? Do you: Click on the BACK http://www.thesitewizard.com/archive/custom404.shtml button of your browser and go somewhere else? Try to back up one directory in the URL (ie, web address) and try again? Write to the webmaster of the site and the referring site to inform them of the situation? If you are like most people, you'll simply click on the BACK button and try another place. The majority of people don't even not found know that there are any other alternatives. You thus need to do something so that you do not lose this group of people who come to your site by following an old link or by typing your URL incorrectly. Requirements for Customizing the 404 File Not Found Page It is not possible to customize your 404 error page if your web host has not found error not enabled this facility for your website. For example, at the time of this writing, if you host at free web hosts like Geocities or Tripod, you will not be able to customize your 404 Error Page. Commercial web hosts, on the other hand, usually provide this facility. If your web host supports a way to customise your 404 file, you will usually find mention of it somewhere in their documentation (or advertisements). In fact, if they mention somewhere that you can customize a file named ".htaccess", it probably means that you can also customize your 404 File Not Found error page. The .htaccess file is what Apache web servers use to allow you to fine-tune your web server configurations at a directory level. Other types of web servers handle the customization of 404 error pages differently. (A web server, in this context, is the software that runs on your web host's computer. It is the program that "serves" your web pages to your visitors.) Step One: Creating/Modifying the .htaccess File This step may not be necessary in all situations. Some web hosts already configure their web server