Install Unbound DNS caching server

Unbound is an Open source DNS caching and recursive resolver. You can find more about unbound at

https://nlnetlabs.nl/projects/unbound/about/

To install unbound on Ubuntu/Debian, run

apt install unbound

To start unbound

systemctl start unbound

Set unbound to start on boot

systemctl enable unbound

To configure your server to use local name servers provided by unbound, edit file

vi /etc/resolv.conf

Add

nameserver 127.0.0.1

See dns