bind SERVFAIL

sera que so falta propaga na net ou named errado?

include "/etc/bind/named.conf.options";
include "/etc/bind/named.conf.local";
include "/etc/bind/named.conf.default-zones";



zone "mbdec.com.br" {
type master;
file "/etc/bind/db.mbdec.com.br";
};
zone "0.168.192.in-addr.arpa" {
type master;
file "/etc/bind/db.0.168.192";
};

agradeço a atenção a quem dispor