linux
<pre><code>server {
listen 80;
# server_name 8.8.8.8;# catch ip address
server_name ~^0-9{1,3}\.0-9{1,3}\.0-9{1,3}\.0-9{1,3}$; # catch ip address
deny all;
}
</code></pre>
<p>From https: //www.reddit.com/r/nginx/comments/3m1qbd/allow_all_domain_names_but_not_ip/</p>