O DNS funciona apenas com ip, mas não com o NS CentOS + Bind9

Estou com dor de cabeça com o DNS.

Digamos que meu IP público é 1.2.3.4, meu IP local é 192.168.0.10 e meu domínio é example.com Estou executando o CentOS em uma máquina virtual (Parallels Desktop para Mac) com uma placa de rede local reservada, obtendo Ip diretamente do roteador. Eu tenho portas 80.443,53 encaminhadas para 192.168.0.10. Os firewalls do Mac OS e do CentOs estão desativados.

O estranho é que quando digito dig @ 1.2.3.4 example.com no meu outro PC, recebo:

; <<>> DiG 9.8.3-P1 <<>> @1.2.3.4 example.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 16941
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;example.com.           IN  A

;; ANSWER SECTION:
example.com.        86400   IN  A   1.2.3.4

;; AUTHORITY SECTION:
example.com.        86400   IN  NS  ns2.example.com.
example.com.        86400   IN  NS  ns1.example.com.

;; ADDITIONAL SECTION:
ns1.example.com.        86400   IN  A   1.2.3.4
ns2.example.com.        86400   IN  A   1.2.3.4

;; Query time: 8 msec
;; SERVER: 1.2.3.4#53(1.2.3.4)
;; WHEN: Sat Nov  2 09:37:36 2013
;; MSG SIZE  rcvd: 109

mas quando digito: dig @ ns1.example.com example.com, ele espera alguns segundos e retorna dig: não foi possível obter o endereço para 'ns1.dsht.in': não encontrado

Este é o meu arquivo de configuração: /etc/named.conf

options {
    listen-on-v6 { none; };

    directory"/var/named";
    dump-file"/var/named/data/cache_dump.db";
    statistics-file"/var/named/data/named_stats.txt";
    memstatistics-file"/var/named/data/named_mem_stats.txt";

    allow-query{ localhost; 192.168.0.0/24; };
    allow-transfer { localhost; 192.168.0.0/24; };
    recursion yes;

    dnssec-enable yes;
    dnssec-validation yes;
    dnssec-lookaside auto;

    bindkeys-file "/etc/named.iscdlv.key";
    managed-keys-directory "/var/named/dynamic";
};
logging {
        channel default_debug {
                file "data/named.run";
                severity dynamic;
        };
};

# change all from here
view "internal" {
        match-clients {
                localhost;
                192.168.0.0/24;
        };
        zone "." IN {
                type hint;
                file "named.ca";
        };
        zone "example.com" IN {
                type master;
                file "example.com.zone";
                allow-update { none; };
        };
        zone "0.168.192.in-addr.arpa" IN {
                type master;
                file "0.168.192.in-addr.arpa";
                allow-update { none; };
        };
include "/etc/named.rfc1912.zones";
include "/etc/named.root.key";
};
view "external" {
        match-clients { any; };
        allow-query { any; };
        recursion no;
        zone "example.com" IN {
                type master;
                file "example.com.zone";
                allow-update { none; };
        };
        zone "4.3.2.1.in-addr.arpa" IN {
                type master;
                file "4.3.2.1.in-addr.arpa";
                allow-update { none; };
        };
};

/var/named/exmaple.com.zone

$TTL 86400
@   IN  SOA     ns1.example.com. host.example.com. (
        2013042201  ;Serial
        3600        ;Refresh
        1800        ;Retry
        604800      ;Expire
        86400       ;Minimum TTL
)
; Specify our two nameservers
        IN  NS      ns1.example.com.
        IN  NS      ns2.example.com.
; Resolve nameserver hostnames to IP, replace with your two droplet IP addresses.
ns1     IN  A       1.2.3.4
ns2     IN  A       1.2.3.4

; Define hostname -> IP pairs which you wish to resolve
@       IN  A       1.2.3.4
        IN  A       1.2.3.4
www     IN  A       1.2.3.4
server2 IN  A   192.168.0.2
*       IN  A       1.2.3.4

/var/named/4.3.2.1.in-addr.arpa

$TTL 2d  ; 172800 seconds
$ORIGIN 4.3.2.1.IN-ADDR.ARPA.
@             IN      SOA   ns1.example.com. host.example.com. (
                              2013010304 ; serial number
                              3h         ; refresh
                              15m        ; update retry
                              3w         ; expiry
                              3h         ; nx = nxdomain ttl
                              )
              IN      NS      ns1.example.com.
              IN      NS      ns2.example.com.
              IN      PTR     example.com.
; etc

/var/named/0.168.192.in-addr.arpa

$TTL 2d  ; 172800 seconds
$ORIGIN 0.168.192.IN-ADDR.ARPA.
@             IN      SOA   ns1.example.com. host.example.com. (
                              2013010304 ; serial number
                              3h         ; refresh
                              15m        ; update retry
                              3w         ; expiry
                              3h         ; nx = nxdomain ttl
                              )
              IN      NS      ns1.example.com.
              IN      NS      ns2.example.com.
10            IN      PTR     example.com.
2         IN      PTR     server2.example.com
; etc

Ficarei muito feliz se alguém puder me ajudar.

Agradeço antecipadamente