thierry@bino:~$ sudo netstat -nlp | grep :53
tcp        0      0 0.0.0.0:53              0.0.0.0:*               LISTEN      3317/samba
tcp6       0      0 :::53                   :::*                    LISTEN      3317/samba
udp    43776      0 0.0.0.0:53              0.0.0.0:*                           3317/samba
udp6    2304      0 :::53                   :::*                                3317/samba