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Tuesday, January 22, 2019

What does HTTP Error 451 mean?

What does HTTP Error 451 mean?

  • Proxy authentication required
  • Request timeout
  • Unavailable for legal reasons
  • Request header fields too large 
What does HTTP Error 451 mean?


HTTP 451: Unavailable For Legal Reasons is an error status code of the HTTP protocol that displays when the user requests an illegal resource, such as a web page censored by a government.  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 number 451 is a reference to Ray Bradbury's 1953 dystopian novel Fahrenheit 451, in which books are outlawed.



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