Membership Lock down will lock all post content including attached images, video, docs, and everything else, everywhere.
All who try to visit the site will be redirected to the login page.
The administrator can enable and disable the lock down as needed. 
Only registered website users will be able to access,
If a user is not logged in we will redirect them to the login page.

Membership Lock

Membership Lock down lets you easily lock all post content including attached images, video, docs, and everything else.

Membership Lock vs Membership For WooCommerce