NXDOMAIN [1] ?

Dnsmasq can return nxdomain responses

echo 'server=/.example.tld/' >> /etc/dnsmasq.conf

Check dnsgate [2] or FreeContributor [3]

[1] https://www.dnsknowledge.com/whatis/nxdomain-non-existent-do...

[2] https://github.com/jakeogh/dnsgate

[3] https://github.com/tbds/FreeContributor