title: access to apache2 website using domain name and not server's IP
body: <p>as written in the title, I want to access to apache2 website using domain name only and not server's IP.</p>
  
  <p>I would like to get a error 403 when trying to access the website with the server's IP.</p>
  
  <p>How is it possible?</p>
  
  <p>thanks</p>