New in Passster 3.4 is the global protection. It basically allows you to set up a protected page as described here and redirect every unauthenticated visitor to that page to force them to add the correct password.
You have to activate the global protection directly within the page you are editing:
Activate the option called “Activate global protection” and configure the details for the protection page in the meta box “Passster (Page Protection).
The global protection requires the cookie option activated within Passster->Options. The Compatibility Mode is optional, but can be required if using any Third-Party-Pagebuilder.