I have two servers in a multi server environment. They are both setup identically with this guide: http://www.howtoforge.com/perfect-server-debian-wheezy-apache2-bind-dovecot-ispconfig-3 However, I want server 1 to act as secondary DNS for the server 2 and server 2 to act a secondary for server 1. How is that accomplished? If I make server 2 a mirror of server 1 it will duplicate the websites as well. I just want reciprocal DNS. Is there a way to do this within ISPCONFIG? or just the old fashioned way?