If you don't explicitly set a DNS to allow access from outside the local network, all your stuff is private and confined within your local network. As it is with all, let's say, wifi stuff that goes on in your home.
Edit. What @notorious said
If you don't explicitly set a DNS to allow access from outside the local network, all your stuff is private and confined within your local network. As it is with all, let's say, wifi stuff that goes on in your home.
Edit. What @notorious said