Configuring a BIND server on CentOS 5
https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/5/html/Deployment_Guide/ch-bind.html
Install "bind" and "bind-chroot". "bind-chroot" makes the BIND service run in the /var/named/chroot environment. All configuration files will be moved there. As such, named.conf will be located in /var/named/chroot/etc/named.conf, and so on.
/sbin/service named configtest