pi-hole.conf.md

server:
    # If no logfile is specified, syslog is used
    logfile: /var/log/unbound/unbound.log
    verbosity: 5
    log-queries: yes

    port: 5353
    do-ip4: yes
    do-udp: yes
    do-tcp: yes

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

    # Use this only when you downloaded the list of primary root
    # servers!
    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