Install Pi-hole DoH

ลง pihole ปกติให้เรียบร้อยแล้วลง

Cloudflared

apt install cloudflared
nano /etc/default/cloudflared

Paste:

CLOUDFLARED_OPTS=--port 5353 --upstream https://1.1.1.1/dns-query --upstream https://1.0.0.1/dns-query --upstream https://[2606:4700:4700::1111]/dns-query --upstream https://[2606:4700:4700::1001]/dns-query

save โดย Ctrl+X, y, Enter

nano /etc/systemd/system/cloudflared.service

[Unit]
Description=cloudflared DNS over HTTPS proxy
After=syslog.target network-online.target

[Service]
EnvironmentFile=/etc/default/cloudflared
ExecStart=/usr/local/bin/cloudflared proxy-dns $CLOUDFLARED_OPTS
Restart=on-failure
RestartSec=10
KillMode=process

[Install]
WantedBy=multi-user.target

save โดย Ctrl+X, y, Enter

systemctl enable cloudflared
systemctl start cloudflared

Then in pihole add "127.0.0.1#5353" as your custom DNS server

https://discourse.pi-hole.net/t/cloudflared-legacy-service-install-fails/54160/22