What is error 451?
Posted: Mon Dec 23, 2024 5:16 am
HTTP Error 451 is an HTTP status code used to indicate that a web page or online resource is inaccessible for legal reasons. This code is inspired by Ray Bradbury's dystopian novel “Fahrenheit 451,” which depicts a society where owning and reading books is prohibited.
The 451 Unavailable For Legal Reasons error is returned by a web server when a request to access a specific resource has been refused for legal reasons, such as government censorship or a court decision.
The HTTP status code 451 was proposed as a standard by the HTTPbis all country mobile number list working group of the IETF (Internet Engineering Task Force), the international body responsible for technical standards for the Internet, to allow better transparency regarding online access restrictions.
What prompted the IETF to consider the proposal was the continued increase in control over the Internet, which has become increasingly strong and insistent, so much so that users are interested in knowing whether the site or online resource they are visiting is blocked for content or other reasons.
However, over the years, the actual adoption of this code by web servers varies and is not yet widespread.
As highlighted, therefore, when it comes to error 451 the page is blocked generally by order of the authorities. There are several other codes that provide information on the status of the request and response between the client and the server: we have included them in this in-depth analysis.
The 451 Unavailable For Legal Reasons error is returned by a web server when a request to access a specific resource has been refused for legal reasons, such as government censorship or a court decision.
The HTTP status code 451 was proposed as a standard by the HTTPbis all country mobile number list working group of the IETF (Internet Engineering Task Force), the international body responsible for technical standards for the Internet, to allow better transparency regarding online access restrictions.
What prompted the IETF to consider the proposal was the continued increase in control over the Internet, which has become increasingly strong and insistent, so much so that users are interested in knowing whether the site or online resource they are visiting is blocked for content or other reasons.
However, over the years, the actual adoption of this code by web servers varies and is not yet widespread.
As highlighted, therefore, when it comes to error 451 the page is blocked generally by order of the authorities. There are several other codes that provide information on the status of the request and response between the client and the server: we have included them in this in-depth analysis.