forcing a registration on new visitors?

how can i force visitors to register before they can see the content? in other words, only registered users can access the site.
thanks.

1) Create a homepage with suitable design listing the reasons to sign up

2) Add sign up form on homepage or link to sign up form

3) Add a login form on homepage

4) Set access roles and permissions for pages in the admin panel

A little research will solve your problem...there’s lots of documentation on this topic