I've noticed that when a bot crawls a closed xenforo site it returns a 403 error 'forbidden' this is when the unregistered/unconfirmed view option is set to 'no'.
This is obviously a problem and other sites where registration is required, e.g. linkedin, pinterest, facebook, ect do not return the same error for a force registration approach.
I have only noticed as google will penalise websites for returning such an error and this has affected us.
How do we correct this and keep the board closed or is there a way to prevent the site returning a 403 error code.