Tente isto:
Em named.conf
:
options {
recursion yes;
}
zone "." IN {
type master;
file "named.root";
};
Em "named.root":
$ORIGIN .
$TTL 1D
@ IN SOA @ none. ( 0 1D 1H 1W 3H );
IN NS @
* IN A a.b.c.d