cuiver

Are you talking about limiting to custom DoH addresses, like allowing "https://yourdomain.something/dns-query/[customsequence]" and refusing requests made to the apex "/dns-query"? Nonetheless, be sure that you don't have port 53 open...

If you want to use it on a mobile setting, the best choice is to configure Wireguard (most resource eficient) on your VPS and establish a connection to it from...