- DNS plain: bind9/named (https://isc.org)
- DNS over HTTPS: doh-server (https://github.com/m13253/dns-over-https)
- DNS over TLS: haproxy (https://haproxy.org)
- DNS over DNSCrypt: dnscrypt-wrapper (https://github.com/cofyc/dnscrypt-wrapper)
- Reverse Proxy: haproxy (https://haproxy.org)