reverzni dns zapis ?

[M.B.]

jak zapisi, pokud delam reverzni zaznam pro cast site ?
napr. pro sit 1.2.3.4/255.255.255.128

zone "domena.cz" IN {
        type master;
        file "domena.cz";
        check-names fail;
        allow-update { none; };
};


zone "4/25.3.2.1.in-addr.arpa" IN {
        type master;
        file "domena.rev";
        check-names fail;
        allow-update { none; };
};

???

nejak mi to nefunguje (ten revers).