Hiding specific forums only from guest view.

[XFdestek]

Hello,

Is this a setting or is custom work required?

Is it possible to restrict access to all the posts in just a specific forum for guests? (but not search engines bots).

So I want the original forum to be on the boards list visible, I would like people to know it exists, but put a content lock on it when clicked by the guest asking them to sign up.

Thank you!