Cloudflared

A Cloudflared docker's image made with Alpine, for DNS over HTTPS.
Can be use with Pihole.

How to use

• Update .env with your informations. Choose the right architectrue (amd64, 386 or arm) For a Raspberry py, choose arm.
• Start the container with docker-compose up --build -d.
• Connect into the container with docker-compose exec cloudflared sh .

In the docker-compose.yml, the cloudflared container has a static ip. You have to use this @ip to specify a custom DNS in your configuration.

To test if everything is working

• Inside the container: dig @172.0.0.1 -p 5053 google.com
• Outside the container : dig @172.28.1.1 -p 5053 google.com

You should have something like this in result :

; <<>> DiG 9.14.4 <<>> @172.28.1.1 -p 5053 google.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 41025
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
; COOKIE: e6c016ce407a1fdd (echoed)
;; QUESTION SECTION:
;google.com.			IN	A

;; Query time: 64 msec
;; SERVER: 172.28.1.1#5053(172.28.1.1)
;; WHEN: jeu. août 15 18:03:27 CEST 2019
;; MSG SIZE  rcvd: 51

Relative links

https://docs.pi-hole.net/guides/dns-over-https/