I did this to allow for me to do some tweaking remotely, and auto-updating (using keys) for certain DNS records so I can connect to my network at home if I want to access resources here.
This led to an interesting issue with updating the zone files…
Masters must be specified as IP addresses, not as domain names, however it is possible to define a ‘masters list’ containing the required addresses which can then be referred to symbolically (see below).
It will not then be able to start serving the zone again until it has performed a zone transfer, and if the master is unavailable for any reason then the period of downtime could be substantial.
There are two ways to control when zone transfers take place: The latter method is preferred as it is both quicker and more efficient.
Typical practice is to have one master, and one or two slaves which take their zone data from that master.
These instructions describe how to configure the slaves.
This is the length of time, in seconds, that a zone resource record is valid. Note: This documentation is provided by Red Hat®, Inc. The copyright holder has added the further requirement that Distribution of substantively modified versions of this document is prohibited without the explicit permission of the copyright holder.