NGINX - Doesn't allow a server to be accessed by ip

no-ip-access-http-only.conf

server {
    listen      80 default_server;
    listen      [::]:80 default_server;
    server_name "";
    return      444;
}

no-ip-access-with-https.conf

server {
  listen 80 default_server;
  listen [::]:80 default_server;
  listen 443 default_server;
  listen [::]:443 default_server;

  # Can be generated by:
  # cd /etc/ssl
  # openssl req -x509 -newkey rsa:2048 -days 10000 -nodes  -subj '/CN=' -keyout null.key -out null.crt
  ssl_certificate /etc/ssl/null.crt;
  ssl_certificate_key /etc/ssl/null.key;

  server_name "";
  return 444;
}