I am following https://www.howtoforge.com/tutorial/perfect-server-ubuntu-20.04-with-apache-php-myqsl-pureftpd-bind-postfix-doveot-and-ispconfig/...
I'm learning how to use secondary zones (so ns2 is not mirror of ns1). I think I have set up correctly, but on the ns2 name server I get errors....
Separate names with a comma.
