[1] For internal zone
This example uses internal address[192.168.1.0/24], domain name[dadiling.com], but please use your own one when you set config on your server.

root@dlp:~#
vim /etc/bind/dadiling.com.lan
------------------------------------------------------------------
$TTL 86400
@ IN SOA dlp.dadiling.com. root.dadiling.com. (
2012042701 ;Serial
3600 ;Refresh
1800 ;Retry
604800 ;Expire
86400 ;Minimum TTL
)

; define name server
@ IN NS dlp.dadiling.com.
; define name server's IP address
@ IN A 192.168.1.210
; define mail exchanger
@ IN MX 10 dlp.dadiling.com.
; define IP address of a hostname
dlp IN A 192.168.1.210
-------------------------------------------------------------
[2] For external zone
This example uses external address[59.125.159.70/29], domain name[dadiling.com], but please use your own one when you set config on your server.

root@dlp:~#
vim /etc/bind/dadiling.com.wan

@ IN SOA dlp.dadiling.com. root.dadiling.com. (
2012042701 ;Serial
3600 ;Refresh
1800 ;Retry
604800 ;Expire
86400 ;Minimum TTL
)

; define name server
@ IN NS dlp.dadiling.com.
; define name server's IP address
@ IN A 59.125.159.74
; define mail exchanger
@ IN MX 10 dlp.dadiling.com.
; define IP address of a hostname
dlp IN A 59.125.159.74
------------------------------------------------------------------
Reverse 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[server.world], but please use your own one when you set config on your server.
root@dlp:~#
vim /etc/bind/1.168.192.db
------------------------------------------------------------------
$TTL 86400
@ IN SOA dlp.dadiling.com. root.dadiling.com. (
2012042701 ;Serial
3600 ;Refresh
1800 ;Retry
604800 ;Expire
86400 ;Minimum TTL
)
; define name server
@ IN NS dlp.dadiling.com.
; define the range of this domain included
@ IN PTR dadiling.com.
@ IN A 255.255.255.0
; define hostname of an IP address
210 IN PTR dlp.dadiling.com.

[4] For external zone
This example uses external address[172.16.0.80/29], domain name[server.world], but please use your own one when you set config on your server.
root@dlp:~#
vi /etc/bind/70.159.125.59.db
$TTL 86400
@ IN SOA dlp.dadiling.com. root.dadiling.com. (
2012042701 ;Serial
3600 ;Refresh
1800 ;Retry
604800 ;Expire
86400 ;Minimum TTL
)

; define name server
@ IN NS dlp.dadiling.com.
; define the range of this domain included
@ IN PTR dadiling.com.
@ IN A 255.255.255.248
# define hostname of an IP address
74 IN PTR dlp.dadiling.com.