Preventing non-registered users from seeing forum posts on jForum

I was wondering if anybody knew of a way to prevent non-registered users from seeing anything in jForum. I represent a company using jForum 2.1.8 in conjunction with a "franchisees only" (must be registered to see) website. It turns out that googling just the right thing will take you to a Joe Public accessible version of the forums, which said company does not want. Any help?

When you first install JForum, there is an anoymous user in the general group. I've never tried deleting that user so it might cause problems, but I would try that first. If that doesn't work, create a new group in the admin control panel that doesn't have access to any forums and reassign the anonymous user to that group.

If the site was already indexed from google, you'll also want to fill out a form to get it out of the google cache.