Switching to DJBDNS works, but switching back to BIND doesn't.
It looks like something goes very wrong.
When i chose back BIND, i couldn't find /etc/init.d/djbdns nor /etc/init.d/named.
Also, yum logs shows
Sep 16 14:32:19 Installed: djbdns-1.05-17.4.mr.el6.x86_64
Sep 16 14:45:18 Installed: djbdns-1.05-17.4.mr.el6.x86_64
Sep 16 15:02:08 Installed: djbdns-1.05-17.4.mr.el6.x86_64
Where did the log entry of yum uninstall of djbdns go?
And clearly bind isn't getting installed according to yum log. Also checked with yum list installed.