This module implements one small simple feature. This module converts http 403 (access denied) errors into http 404 errors. I haven't test this module, and haven't tested this module with the very helpful Search404 module, but if they work together, it could be very handy. Working together when a site visitor (especially spammer) attempt to visit access denied URLs, the emitted 403 error would be converted to a 404 error which would then be caught by the Search404 module which would then redirect the visitor to the website's search page with the url converted to keywords. Whether a normal visitor or a spammer, the result would be intelligent, gracefully indicating to the site visitor that they may need to search elsewhere on the site for available content.
403 to 404 Module
Drupal 8 Version Number
8.x-1.0-alpha3
Release Date
Importance
5
Description and Notes
Project Link