Tracking the HTTP 451 Error Code
May 15, 2022
![A cartoon image of a server icon with a flame and cloud in the background](/static/94a2583bec971990dc53411bfda9cfdf/82c11/logo.png)
Since 2016, the HTTP 451 code has been an adopted standard (just like 404 not found or 500 internal server error) and should be returned when a server denies access to some content as a result of a legal request. This project uses the Censys internet scanning project to automatically perform searches for publicly accessible servers that are providing HTTP access and returning a response code of 451 gather daily statistics, and save copies of the fully HTTP response body.
You can view up-to-date data, visualizations, and additional details about the project at https://http451.info
See this page for more information about the project.