fatto, ho aggiunto questo in named.conf

codice:
zone "debian.org" {
        type master;
        file "/etc/bind/debian.org";
};
e questo in debian.org

codice:
$TTL 3D
@       IN      SOA     ns1.debian.org. mionomehost.debian.org. (
                   200701051            ; serial
                               86400       ; refresh
           3600             ; retry
        604800            ; expire
                        86400 )            ; minimum
        NS    ns1
        NS    ns2
                MX      10      mail
                TXT     "dominio debian.org :-)"
localhost           A     127.0.0.1
security               A    123.124.125.127
ftp.it                 A     123.124.125.127
ns1                   A     123.124.125.127
ns2        A     123.124.125.127
debian.org.    A     123.124.125.126
C'è qualche fronzolo in più