Installing BIND DNS Server from ssh shell is the best option, even though Webmin gives the ability to install it from the web interface.

Yum has a BIND rpm that installs bind in a much more secure manner using a strategy called BIND CHROOT Jail.   Obviously a secure method is much more preferable especially when you are talking about how a domain name is to be routed.

Before we do the Yum install of BIND CHROOT jail, lets look at it from Webmin first as we will come back to Webmin for BIND configurations once its installed.

Servers > BIND DNS Server