zone "mydomain.com" {
  type master;
  notify yes;
  file "/var/lib/bind/db.mydomain.com";
  allow-update { key rndc-key; };
};

zone "200.199.10.in-addr.arpa" IN {
  type master;
  notify yes;
  file "/var/lib/bind/db.200.199.10.in-addr.arpa.rev";
  allow-update { key rndc-key; };
};