Help:Cascading protection
From Wikia Help
Cascading protection is a form of page protection which allows you to protect a page so that all templates, images, or other pages transcluded to the page will also be protected without needing to protect those pages one at a time.
When a template is vandalized, especially on a page which uses many templates, it may not be immediately obvious which page/template needs to be fixed, prolonging the amount of time that the page remains vandalized.
How do I cascade protect a page?
Just click the "protect" tab/link as usual; cascade protect is there among normal protection options. The protection level must be "sysop" in order to activate cascading protection; it will not work at the "autoconfirmed" level, which only affects new and unregistered users.
