What Is A Domain Name Server (DNS) And How Does It Work

Domain Name System is an Internet service that translates domain names into IP addresses and IP addresses into domain names.This is necessary because, although domain names are easy for people to remember, computers or machines, access websites based on IP addresses. Every time you use a domain name, therefore, a DNS service must translate the name into the corresponding IP address. For example, the domain name www.satyam.com might translate to 120.0.0.20.

DNS Zone Types

Forward Lookup Zones:

The most common zone of DNS is forward lookup zone. its main work to converts host name into IP address. In windows server 2008 you can divide your zone into three regions that are primary, secondary and stub.

How to create Forward lookup primary DNS zone in server 2008

Step1 First you would give an IP on going to "ncpa.cpl" there you right click on Local Area Connection and going ther properties then you give an IP. sapoose I am take an IP i.e. 120.0.0.20

Step2 Go to server manager and select ROLES and after that ADD ROLES then click on DNS and install that

Step3 Click on start button then Administrative tool and then DNS

Step4 Here you expend the computer name, Right click on Forward Lookup zone and select new zone After that New zone wizard is open infront of you. here I take an example like "Satyam.com" and after that click next

Step5 here you select Allow both nonsecure and secure

And click Next and at last you select Finish.

Step6 After that you expend Forward lookup zone, Right click on Hsos name and select New Host ( A or AAA ).... and after opening wizard infront of you, you will type only "www" in name box and select Add Host

How to create Reverse lookup zone in server 2008

Reverse lookup zone allows the client to get the name of the corresponding IP address by querying, in reverse lookup zone we can create the PTR (Pointer) again any host.

Step1 Creating reverse zone in active directory is almost same as forward lookup zone. Right click on reverse zone in DNS console and click on new zone.

Here you fill Network ID and after clicking next select Allow both nonsecure and secure and at last select Finish

Step2 expend reverse lookup zone, right click on IP and select "New Pointer ( PTR ). After open wizard you are fill the host name in my case i.e. "www.satyam.com" and select "ok"