How to have nginx use a default page for non-domains

Question

Not really sure how to word the title. Say for example I only want my webserver accessible from domains and NOT the IP. How can I set a default page for when it's accessed via the IP directly?

Answer 1

Add a default server with some index page:

server {
   listen 80 default;
   server_name _;
   root /var/www/default/;
}