Two DNS servers: the main one first to ask the second one. How to setup?

Question

Domain Name System

Good day.
There is a main domain controller on Windows Server 2012.
There is also a web lab (CentOS + Vesta panel (there is its own DNS))
Tell me how to make the DNS on the DC first ask the lab, and only then go to the provider's DNS?

Answer 1

Configure DNS query forwarding on the server (Administration ->DNS, select server, select the "forwarders" section), specifying the address of the laboratory machine as the target.
On the laboratory machine, configure redirection to the provider: if bind is used, set in /etc/named.conf, in the options block, the block forwarders{IP_DNS_provider;};