How to make members profile not viewable by public?

hello,
Sorry to ask about this. I can't find any related question in this forum.

Any visitor/public user can just see almost everything in my members profile.
favorites, badges, questions, location, etc...

sample
http://mywebsite.com/forum/profile/member23.html

I don't want the public to see it because some users are using their real names and wanted a bit of privacy.

How do I restrict visitor seeing the members profile? I tried in kunena and it works ok, it asked me to login.

I want only registered users able to see the members profile.

Thanks!