server {
   listen 80 default_server;
   listen [::]:80 default_server;

   server_name _;

   return 304;
}

server {
    listen 443 default_server;
    listen [::]:443 default_server;
    server_name _;
    ssl on;
    ssl_certificate /etc/nginx/ssl/null/null.crt;
    ssl_certificate_key /etc/nginx/ssl/null/null.key;
    return 304;
}