ubuntu dns server(bind9) installation

install bind9:
	sudo apt-get install bind9

add dns forwarders to /etc/bind/named.conf.options:
	sudo nano /etc/bind/named.conf.options

	add internet provider dns server ip or other dns server like google in the forwarders section:
	forwarders
	{
		8.8.8.8;
		8.8.4.4;
	};

define forward lookup zone and reverse lookup zone to /etc/bind/named.conf.local:
	sudo nano /etc/bind/named.conf.local

for forward lookup zone whose network ip is 192.168.254.0:
	zone "myowndomain.com"
	{
		type master;
		file "/etc/bind/zones/myowndomain.com.db";
	};

for reverse lookup zone for the 192.168.254.0 network:
	zone "254.168.192.in-addr.arpa"
	{
		type master;
		file "rev.254.168.192.in-addr.arpa";
	};

create the zones folder:
	sudo mkdir /etc/bind/zones

create the forward lookup zone file myowndomain.com.db:
	sudo nano /etc/bind/zones/myowndomain.com.db

	add the following entry to the file:
	the number value below is for serial#, refresh, retry, expire, minimum:

		$TTL 3D
		@ IN SOA server1.myowndomain.com. admin.myowndomain.com. (
		2007031001;
		28800;
		3600;
		604800;
		38400
		);

		myowndomain.com.	IN	NS	server1.myowndomain.com.
		server1			IN	A	192.168.254.254
		server2			IN	A	192.168.254.250
		gateway			IN	A	192.168.254.1
		www			IN	CNAME	server1


create the reverse lookup zone file rev.254.168.192.in-addr.arpa:
	sudo nano /etc/bind/zones/rev.254.168.192.in-addr.arpa

	add the following entry to the file:
	the number value below is for serial#, refresh, retry, expire, minimum:

		$TTL 3D
		@ IN SOA server1.myowndomain.com. admin.myowndomain.com. (
		2007031001;
		28800;
		3600;
		604800;
		38400
		);

					IN	NS	server1.myowndomain.com.
		254			IN	PTR	server1.myowndomain.com.
		250			IN	PTR	server2.myowndomain.com.
		1			IN	PTR	gateway.myowndomain.com.


edit resolv.conf:
	sudo nano /etc/resolv.conf

	add dns suffix search:
		search myowndomain.com
	point dns resolution to the local dns server:
		nameserver 192.168.254.254

restart bind9:
	sudo /etc/init.d/bind9 restart

test dns resolution with nslookup:
	nslookup server1
	nslookup server2
	nslookup gateway

to check if the config files have no errors:
	named-checkconf /etc/bind/named.conf.options
	named-checkconf /etc/bind/named.conf.local

to check if the zone files have no errors:
	named-checkzone myowndomain.com /etc/bind/zones/myowndomain.com.db
	named-checkzone 254.168.192.in-addr.arpa /etc/bind/zones/rev.254.168.192.in-addr.arpa
---------------------------------------------------------------------------------------
use dig command to check dns:

check via FQDN (check status, question section, answer section, authority section):
	dig server1.myowndomain.com | less

check via IP address (check status, question section, answer section, authority section, additional section):
	dig -x 192.168.254.254 | less

check SOA records of myowndomain.com (check status, question section, answer section, authority section, additional section):
	dig -t SOA mydomain.com | less

check zone transfers and all records:
	dig -t axfr myowndomain.com | less
-----------------------------------------------------------------------------------------
use host command to check dns:

check via FQDN:
	host server1.myowndomain.com

check via domain name:
	host myowndomain.com

check via IP address:
	host 192.168.254.254
=========================================================================================
FORWARD ZONE:

$ORIGIN .
$TTL 86400 ; 1day
myowndomain.com. IN SOA server1.myowndomain.com. hostmaster.myowndomain.com. (
	2014012001 ; serial - YYYYMMDDII format
	8H ; refresh
	4H ; retry
	3W ; expires
	1D ; minimum
)

myowndomain.com.	IN NS server1.myowndoamin.com.
myowndomain.com.	IN MX 10 server1.myowndomain.com.

$ORIGIN myowndomain.com.
server1			IN	A	192.168.254.254
server2			IN	A	192.168.254.250
gateway			IN	A	192.168.254.1
www			IN	CNAME	server1

----------------------------------------------------------------------------------------

REVERSE ZONE:

@ IN SOA server1.myowndomain.com. hostmaster.myowndomain.com. (
	2014012001 ; serial - YYYYMMDDII format
	8H ; refresh
	4H ; retry
	3W ; expires
	1D ; minimum
)

			IN NS server1.myowndomain.com.
254			IN	PTR	server1.myowndomain.com.
250			IN	PTR	server2.myowndomain.com.
1			IN	PTR	gateway.myowndomain.com.

=======================================================================================