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- HTTP_451 abstract "In computer networking, HTTP 451 Unavailable For Legal Reasons is an error status code of the HTTP protocol to be displayed when the user requests an illegal resource, such as a web page censored by a government. The number 451 is a reference to Ray Bradbury's 1953 dystopian novel Fahrenheit 451, in which books are outlawed. 451 could be described as a more descriptive variant of 403 Forbidden.This status code is standardized in RFC 7725.Examples of situations where an HTTP 451 error code could be displayed include web pages deemed a danger to national security, or web pages deemed to violate copyright, privacy, blasphemy laws, or any other law or court order.The RFC is specific that a 451 response does not indicate whether the resource exists but requests for it have been blocked, if the resource has been removed for legal reasons and no longer exists, or even if the resource has never existed, but any discussion of its topic has been legally forbidden (see superinjunction). Some sites have previously returned HTTP 404 (Not Found) or similar if they are not legally permitted to disclose that the resource has been removed. Such a tactic is used in the United Kingdom by some internet service providers utilising the Internet Watch Foundation blacklist, returning a 404 message or another error message instead of showing a message indicating the site is blocked.The status code was formally proposed in 2013 by Tim Bray, following earlier informal proposals by Chris Applegate in 2008 and Terence Eden in 2012. It was approved by the IESG on December 18, 2015. It was published as RFC 7725 in February 2016.".
- HTTP_451 wikiPageExternalLink rfc7725.
- HTTP_451 wikiPageID "42195854".
- HTTP_451 wikiPageLength "3855".
- HTTP_451 wikiPageOutDegree "20".
- HTTP_451 wikiPageRevisionID "707879826".
- HTTP_451 wikiPageWikiLink Category:Hypertext_Transfer_Protocol_status_codes.
- HTTP_451 wikiPageWikiLink Category:Internet_censorship.
- HTTP_451 wikiPageWikiLink Chris_Applegate.
- HTTP_451 wikiPageWikiLink Computer_network.
- HTTP_451 wikiPageWikiLink Dystopia.
- HTTP_451 wikiPageWikiLink Evil_bit.
- HTTP_451 wikiPageWikiLink Fahrenheit_451.
- HTTP_451 wikiPageWikiLink Gag_order.
- HTTP_451 wikiPageWikiLink HTTP_403.
- HTTP_451 wikiPageWikiLink HTTP_404.
- HTTP_451 wikiPageWikiLink Hypertext_Transfer_Protocol.
- HTTP_451 wikiPageWikiLink Injunction.
- HTTP_451 wikiPageWikiLink Internet_Engineering_Steering_Group.
- HTTP_451 wikiPageWikiLink Internet_Watch_Foundation.
- HTTP_451 wikiPageWikiLink List_of_HTTP_status_codes.
- HTTP_451 wikiPageWikiLink Ray_Bradbury.
- HTTP_451 wikiPageWikiLink Technological_fix.
- HTTP_451 wikiPageWikiLink Terence_Eden.
- HTTP_451 wikiPageWikiLink United_Kingdom.
- HTTP_451 wikiPageWikiLinkText "451 Unavailable For Legal Reasons".
- HTTP_451 wikiPageWikiLinkText "HTTP 451".
- HTTP_451 wikiPageWikiLinkText "Unavailable For Legal Reasons".
- HTTP_451 wikiPageUsesTemplate Template:Compu-network-stub.
- HTTP_451 wikiPageUsesTemplate Template:HTTP.
- HTTP_451 wikiPageUsesTemplate Template:Reflist.
- HTTP_451 subject Category:Hypertext_Transfer_Protocol_status_codes.
- HTTP_451 subject Category:Internet_censorship.
- HTTP_451 hypernym Code.
- HTTP_451 type Film.
- HTTP_451 comment "In computer networking, HTTP 451 Unavailable For Legal Reasons is an error status code of the HTTP protocol to be displayed when the user requests an illegal resource, such as a web page censored by a government. The number 451 is a reference to Ray Bradbury's 1953 dystopian novel Fahrenheit 451, in which books are outlawed.".
- HTTP_451 label "HTTP 451".
- HTTP_451 sameAs Q17055519.
- HTTP_451 sameAs HTTP_451.
- HTTP_451 sameAs HTTP_451.
- HTTP_451 sameAs HTTP_451.
- HTTP_451 sameAs Erreur_HTTP_451.
- HTTP_451 sameAs שגיאה_451.
- HTTP_451 sameAs HTTP_451.
- HTTP_451 sameAs HTTP_451.
- HTTP_451 sameAs m.0_yjp6q.
- HTTP_451 sameAs HTTP_451.
- HTTP_451 sameAs HTTP_451.
- HTTP_451 sameAs Q17055519.
- HTTP_451 sameAs HTTP_451.
- HTTP_451 wasDerivedFrom HTTP_451?oldid=707879826.
- HTTP_451 isPrimaryTopicOf HTTP_451.