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A DNS over HTTPS (DoH) client written in elixir.
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Dough

Dough is a DoH (DNS Queries over HTTPS) server written in Elixir

This server was written to the IEFT Draft Spec draft-ietf-doh-dns-over-https-14, and has been tested and works flawlessly with Mozilla Firefox trr configuration.

Motivation

After Mozilla announced their DNS over HTTPS client, the Trusted Recursive Resolver (TRR) in partnership with Cloudflare, it sparked a privacy outcry. Many were upset that Mozilla was choosing to have an opt-out option that sends all visited hostnames to a third-party US based corporation.

This has the potential to centralize DNS infrastructure further, and allows monopolistic control over an even greater portion of internet traffic.

Users should have control over this feature, and be able to choose their DoH proxy server from sources they actually trust.

Running the server

You can compile and run a release by executing the following.

$ mix deps.get

$ MIX_ENV=prod mix release --env=prod

$ cp _build/prod/rel/dough/etc/dough.toml ~/.config

$ _build/prod/rel/dough/bin/dough foreground

Feel free to edit the config file at ~/.config/dough.toml to configure it to use your favourite DNS provider as the proxy. By default, it's configured to use OpenNIC DNS servers for maximum freedom (as in birds).

Configure Firefox

The quickest way to configure firefox is to visit about:config, then search for trr, setting the following values:

# force TRR mode, disable normal DNS lookups
network.trr.mode;3

# set your DoH server address. You need to use an IP, not a domain name,
# otherwise you won't be able to look it up with mode 3 set.
network.trr.uri;https://127.0.0.1:8331/dns-query

# a domain firefox will resolve to make sure TRR works.
network.trr.confirmationNS;thurloat.com