Ubuntu 14.04
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Name Resolution
2014/04/19
  Create zone files that servers resolve IP address from domain name.
 
[1]
For internal zone
This example uses internal address[10.0.0.0/24], domain name[srv.world], but please use your own one when you set config on your server.
root@dlp:~#
vi /etc/bind/srv.world.lan 
$TTL 86400
@   IN  SOA     dlp.srv.world. root.srv.world. (
        2014041801  ;Serial
        3600        ;Refresh
        1800        ;Retry
        604800      ;Expire
        86400       ;Minimum TTL
)
# define name server

        IN  NS      dlp.srv.world.
# define name server's IP address

        IN  A       10.0.0.30
# define mail exchanger

        IN  MX 10   dlp.srv.world.
# define IP address of a hostname

dlp     IN  A       10.0.0.30
[2]
For external zone
This example uses external address[172.16.0.80/29], domain name[srv.world], but please use your own one when you set config on your server.
root@dlp:~#
vi /etc/bind/srv.world.wan 
$TTL 86400
@   IN  SOA     dlp.srv.world. root.srv.world. (
        2014041801  ;Serial
        3600        ;Refresh
        1800        ;Retry
        604800      ;Expire
        86400       ;Minimum TTL
)
# define name server

        IN  NS      dlp.srv.world.
# define name server's IP address

        IN  A       172.16.0.82
# define mail exchanger

        IN  MX 10   dlp.srv.world.
# define IP address of a hostname

dlp     IN  A       172.16.0.82
Address Resolution
  Create zone files that servers resolve domain names from IP address.
 
[3]
For internal zone
This example uses internal address[10.0.0.0/24], domain name[srv.world], but please use your own one when you set config on your server.
root@dlp:~#
vi /etc/bind/0.0.10.db 
$TTL 86400
@   IN  SOA     dlp.srv.world. root.srv.world. (
        2014041801  ;Serial
        3600        ;Refresh
        1800        ;Retry
        604800      ;Expire
        86400       ;Minimum TTL
)
# define name server

        IN  NS      dlp.srv.world.
# define the range of this domain included

        IN  PTR     srv.world.
        IN  A       255.255.255.0
# define hostname of an IP address

30      IN  PTR     dlp.srv.world.
[4]
For external zone
This example uses external address[172.16.0.80/29], domain name[srv.world], but please use your own one when you set config on your server.
root@dlp:~#
vi /etc/bind/80.0.16.172.db 
$TTL 86400
@   IN  SOA     dlp.srv.world. root.srv.world. (
        2014041801  ;Serial
        3600        ;Refresh
        1800        ;Retry
        604800      ;Expire
        86400       ;Minimum TTL
)
# define name server

        IN  NS      dlp.srv.world.
# define the range of this domain included

        IN  PTR     srv.world.
        IN  A       255.255.255.248
# define hostname of an IP address

82      IN  PTR     dlp.srv.world.
 
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