Bind
From DWIKI
Berkeley Internet Name Domain, also known as named
Documentation
HOWTO
add rndc
https://linuxconfig.org/configure-rndc-key-for-bind-dns-server-on-centos-7
FAQ
refresh: non-authoritative answer from master
CNAME and other data
named-checkconf -z
should point at the line problem
xfer-in failed while receiving responses: NOTAUTH
Server Not Authoritative for zone,
host unreachable resolving xxx=
??