A. Setup

An init script and configuration file have been provided to run dnscrypt-proxy
as a daemon. To configure dnscrypt-proxy, edit
/etc/dnscrypt-proxy/dnscrypt-proxy.toml with the desired settings. By default
dnscrypt-proxy will use a random DNS server and will run on localhost
(127.0.0.1), port 53.

The configuration file is setup to use a dnscrypt user by default. In order to
use the default configuration you should create a dnscrypt user and group with
the following commands:

    groupadd -g 293 dnscrypt
    useradd -u 293 -g 293 -c "DNSCrypt" -d /run/dnscrypt -s /bin/false dnscrypt

If you decide to use another user you should edit the USER setting in
/etc/default/dnscrypt-proxy and the user_name setting in
/etc/dnscrypt-proxy/dnscrypt-proxy.toml (there are example settings provided
for the user 'nobody').

In order to send all DNS requests through dnscrypt-proxy, you will need to
update /etc/resolv.conf to point to localhost. If using dhcpcd, the easiest way
to set dnscrypt-proxy as the primary (but not exclusive) dns resolver is to
create file /etc/resolv.conf.head with the following line:

    nameserver 127.0.0.1

You may also have to add the following line to enable EDNS:

    options edns0

To start dnscrypt-proxy automatically at system start, add the following to
/etc/rc.d/rc.local:

    if [ -x /etc/rc.d/rc.dnscrypt-proxy ]; then
        /etc/rc.d/rc.dnscrypt-proxy start
    fi

To properly stop dnscrypt-proxy on system shutdown, add the following to
/etc/rc.d/rc.local_shutdown:

    if [ -x /etc/rc.d/rc.dnscrypt-proxy ]; then
        /etc/rc.d/rc.dnscrypt-proxy stop
    fi

B. DNS Cache

dnscrypt-proxy provides control over how it caches DNS queries via its
configuration file. However, you can also run your own local caching DNS
server. A sample configuration for dnsmasq (included with Slackware) is
provided at /usr/doc/dnscrypt-proxy-@VERSION@/dnsmasq.conf. A sample
configuration for bind/named that also does local DNSSEC validation (if
supported by the upstream DNS server) is also provided at
/usr/doc/dnscrypt-proxy-@VERSION@/named.conf. Both configurations run on port
53, forwarding lookups to dnscrypt-proxy running on port 55. In order to use
these configurations you will need to change the port dnscrypt-proxy runs on in
/etc/dnscrypt-proxy/dnscrypt-proxy.toml. If you perform your own DNS caching,
it makes sense to disable dnscrypt-proxy's caching in its configuration file.