Limited-access user permission lockdown mode
When this feature is enabled, permissions for users in the "limited access" permissions level (such as Anonymous Users) are reduced, preventing access to Application Pages.
SharePoint 2016
Feature Details
ID 7c637b23-06c4-472d-9a9a-7c175762c5c4
Scope Site
Hidden False
ActivateOnDefault True
AlwaysForceInstall False
RootDirectory C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\Template\Features\ViewFormPagesLockDown
ReceiverClass Microsoft.SharePoint.Publishing.ViewFormPagesLockDownFeatureHandler, Microsoft.SharePoint.Publishing, Version=16.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c