Install notes

First install a DNS cacher, such as dnsmasq using you package manager. For example for Debian/Ubuntu GNU/Linux distribution

sudo apt-get install dnsmasq

Backup the /etc/dnsmaq.conf . Edit the dnsmaq.conf or use configuration file provided in the conf directory

You have two options:

Edit the /etc/resolv.conf and put as first entry

nameserver 127.0.0.1

Add two more DNS resolvers.

# External nameservers
nameserver <ip address>
nameserver <ip address>

Protect the /etc/resolv.conf

chattr +i /etc/resolv.conf

Edit /etc/dnsmaq.conf and add the following line

resolv-file=/etc/dnsmasq.resolv.conf

and add in /etc/dnsmasq.resolv.conf the external DNS servers

# External nameservers
nameserver <ip address>
nameserver <ip address>

Enable and start the dnsmasq deamon. If you use systemd:

systemctl enable dnsmasq && systemctl start dnsmasq

Create the directory /etc/dnsmasq.d and select/copy the files in the directory data/dnsmasq.d

After you have correctly configure your dnsmasq as your DNS cache server, you can test it with command

› nslookup <website.tld>

To examine the query process, uncommnent log-queries in /etc/dnsmasq.conf and watch syslog with command:

sudo tail -f /var/log/syslog

Or manually start dnsmasq with the following options:

sudo dnsmasq -q -d

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