DNSCrypt server Docker image
============================

Run your own caching, non-censoring, non-logging, DNSSEC-capable,
[DNSCrypt](http://dnscrypt.org)-enabled DNS resolver virtually anywhere!

If you are already familiar with Docker, it shouldn't take more than 5 minutes
to get your resolver up and running.

Installation
============

Download the Docker image source:

    $ git clone https://github.com/jedisct1/dnscrypt-server-docker.git

Build the image:

    $ docker build -t dnscrypt-server-image .

Think about a name. This is going to be part of your DNSCrypt provider name.
If you are planning to make your resolver publicly accessible, this name will
be public.
It has to look like a domain name (`example.com`), but it doesn't have to be
a registered domain either.

Let's pick `example.com` here.

Create and initialize the container, once and for all:

    $ docker run --name=dnscrypt-server \
        -p 443:443/udp -p 443:443/tcp \
        dnscrypt-server-image init -N example.com

This will only accept connections via DNSCrypt. Containers on the same virtual
network can directly access the DNS cache on the standard DNS port (53), but
to create a non-authenticated public DNS resolver, this extra port has to be
explicitly exposed (`-p 53:53/udp -p 53:53/tcp`).

Now, to start the whole stack:

    $ docker start dnscrypt-server

Done.

To check that your DNSCrypt-enabled DNS resolver is accessible, run the
DNSCrypt client proxy on another host:

    # dnscrypt-proxy \
        --provider-key=<provider key, as displayed when the container was initialized> \
        --resolver-address=<your resolver's public IP address> \
        --provider-name=2.dnscrypt-cert.example.com

And try using `127.0.0.1` as a DNS resolver.

Note that the actual provider name for DNSCrypt is `2.dnscrypt-cert.example.com`,
not just `example.com` as initially entered. The full name has to start with
`2.dnscrypt-cert.` for the client and the server to use the same version of the
protocol.

Let the world know about your server
====================================

Is your brand new DNS resolver publicly accessible?

Fork the [dnscrypt-proxy repository](https://github.com/jedisct1/dnscrypt-proxy),
edit the [dnscrypt.csv](https://github.com/jedisct1/dnscrypt-proxy/blob/master/dnscrypt-resolvers.csv)
file to add your resolver's informations, and submit a pull request to have it
included in the list of public DNSCrypt resolvers!

Details
=======

- Caching resolver: [Unbound](https://www.unbound.net/), with DNSSEC, prefetching,
and no logs. The number of threads and memory usage are automatically adjusted.
Latest stable version, compiled from source.
- [LibreSSL](http://www.libressl.org/) - Latest stable version, compiled from source.
- [libsodium](https://download.libsodium.org/doc/) - Latest stable version,
minimal build compiled from source.
- [dnscrypt-wrapper](https://github.com/Cofyc/dnscrypt-wrapper) - Latest stable version,
compiled from source.
- [dnscyrpt-proxy](https://github.com/jedisct1/dnscrypt-proxy) - Latest stable version,
compiled from source.