Faster home internet!

How to get a pi-hole DNS server up and running the right way.

Normally I just used it as an add-blocker, but it can also be a recursive DNS server. This is what 1.1.1.1, 8.8.8.8, and your ISP's DNS servers are.

A video tutorial by Craft Computing is below:

Pre-Requisites

Set up a Ubuntu 20.04 Server on your local network. Find it's IP address and SSH into it.

Procedure

We will:

  server:
  \# If no logfile is specified, syslog is used
  \# logfile: "/var/log/unbound/unbound.log"
  verbosity: 0

        interface: 127.0.0.1
        port: 5335
        do-ip4: yes
        do-udp: yes
        do-tcp: yes

        # May be set to yes if you have IPv6 connectivity
        do-ip6: no

        # You want to leave this to no unless you have *native* IPv6. With 6to4 and
        # Terredo tunnels your web browser should favor IPv4 for the same reasons
        prefer-ip6: no

        # Use this only when you downloaded the list of primary root servers!
        # If you use the default dns-root-data package, unbound will find it automatically
        #root-hints: "/var/lib/unbound/root.hints"

        # Trust glue only if it is within the server's authority
        harden-glue: yes

        # Require DNSSEC data for trust-anchored zones, if such data is absent, the zone becomes BOGUS
        harden-dnssec-stripped: yes

        # Don't use Capitalization randomization as it known to cause DNSSEC issues sometimes
        # see https://discourse.pi-hole.net/t/unbound-stubby-or-dnscrypt-proxy/9378 for further details
        use-caps-for-id: no

        # Reduce EDNS reassembly buffer size.
        # Suggested by the unbound man page to reduce fragmentation reassembly problems
        edns-buffer-size: 1472

        # Perform prefetching of close to expired message cache entries
        # This only applies to domains that have been frequently queried
        prefetch: yes

        # One thread should be sufficient, can be increased on beefy machines. In reality for most users running on small networks or on a single machine, it should be unnecessary to seek performance enhancement by increasing num-threads above 1.
        num-threads: 1

        # Ensure kernel buffer is large enough to not lose messages in traffic spikes
        so-rcvbuf: 1m

        # Ensure privacy of local IP ranges
        private-address: 192.168.0.0/16
        private-address: 169.254.0.0/16
        private-address: 172.16.0.0/12
        private-address: 10.0.0.0/8
        private-address: fd00::/8
        private-address: fe80::/10

Restart Unbound to apply Configuration

sudo service unbound restart

Disable Forwarding DNS in PiHole

Set Custom DNS in PiHole - 127.0.0.1#5335

Pi Hole Custom DNS Screen Showing Local IP For Unbound DNS as Upstream DNS Server

Setup Router to use Pi-Hole IP Address as only DNS server (varies for your DHCP server on your router)

Enjoy your private, ad-blocking, self hosted recursive DNS server!