BIND

The Berkley Internet Naming Daemon or DNS Server.

WARNING: key file (/etc/bind/rndc.key) exists, but using default configuration file (/etc/bind/rndc.conf)
The fix is simple:

include "/etc/bind/rndc.key"; controls { inet 127.0.0.1 port 953 allow { 127.0.0.1; } keys { "rndc-key"; }; };
 * 1) In /etc/bind remove rndc.conf.
 * 2) Add the following to /etc/bind/named.conf:
 * 1) Restart bind.