Configuring site login

Using the login plugin how do you make it so that the whole site front end requires login?
As far as I can tell you can only configure login per page, or for subsections of a page. What if you have 10 different subsections?

There is no site-wide global login, and it’s unlikely to have one in a site. You need to enable parent_acl ( and mark each section as requiring a login.

OK thanks – I think a global login would be handy for an rtfm type site where you might have a lot of sections to a manual