pihole-coredns-tls-docker

Easily set up pihole and coredns to use DNS over TLS with Docker. Currently used on and tested on a single Raspberry Pi 4 but I'm sure it will work on any unix based system.

1. Install docker and docker-compose
2. Clone this repo
3. Change to coredns directory and run the genCerts.sh script.
4. Go back to root directory and edit docker-compose.yml and set a web password. Also change the topmost DNS server for pihole to your gateway's IP. Mine happens to be 10.30.0.1
5. Run docker-compose up -d
6. Go to IP of server to enter pihole dashboard, deselect prior DNS settings and set DNS custom1 to 172.10.10.100#53 for coredns

Verify outgoing DNS over TLS to Cloudflare

Use any of the following:

1. https://www.cloudflare.com/ssl/encrypted-sni/
2. https://1.1.1.1/help

Verify incoming DNS over TLS requests on port 853

kdig @IP +tls example.com where IP is ip address of device running the containers

Useful debugging commands

Open up shell on pihole container docker exec -ti pihole bash

View all details about some container docker inspect pihole