pi-hole/advanced/dnsmasq.conf

# If you want dnsmasq to read another file, as well as /etc/hosts, use
# this.
addn-hosts=/etc/pihole/gravity.list

# The following two options make you a better netizen, since they
# tell dnsmasq to filter out queries which the public DNS cannot
# answer, and which load the servers (especially the root servers)
# unnecessarily. If you have a dial-on-demand link they also stop
# these requests from bringing up the link unnecessarily.

# Never forward plain names (without a dot or domain part)
domain-needed
# Never forward addresses in the non-routed address spaces.
bogus-priv

# If you don't want dnsmasq to read /etc/resolv.conf or any other
# file, getting its servers from this file instead (see below), then
# uncomment this.
no-resolv

# Add other name servers here, with domain specs if they are for 
# non-public domains.
server=8.8.8.8
server=8.8.4.4

# If you want dnsmasq to listen for DHCP and DNS requests only on
# specified interfaces (and the loopback) give the name of the
# interface (eg eth0) here.
interface=eth0
# Or which to listen on by address (remember to include 127.0.0.1 if
# you use this.)
listen-address=127.0.0.1

# Set the cachesize here.
cache-size=10000

# For debugging purposes, log each DNS query as it passes through
# dnsmasq.
log-queries
log-facility=/var/log/pihole.log

# Normally responses which come from /etc/hosts and the DHCP lease
# file have Time-To-Live set as zero, which conventionally means
# do not cache further. If you are happy to trade lower load on the
# server for potentially stale date, you can set a time-to-live (in
# seconds) here.
local-ttl=300