Comment by liv-io

I'd recommend you to use Unbound and specify the named.root or (root.hints) file:

https://www.internic.net/domain/named.root

This Ansible role takes care of configuring it all (CentOS):

https://github.com/liv-io/ansible-roles-centos/tree/master/u...

I have it for FreeBSD and OpenBSD too:

https://github.com/liv-io/ansible-roles-bsd/tree/master/unbo...