How to Install DNS on Linux

 In this tutorial, I show you how to Install and Configure DNS servers on a Linux system. If you want to understand how DNS works please click this URL how DNS works?

Before, Install and configure the DNS system you need to understand and know about your DNS structure. 

BIND is the best software for handling DNS service. BIND stands for Berkley Internet Naming Daemon developed by ISC (Internet Systems Consortium). Learn more about ISC by https://www.isc.org/.

Installation BIND9

To install the bind9 package using the appropriate package management utilities for your Linux distro.

On Debian/Ubuntu flavors, do the following:

$ sudo apt-get update

$ sudo apt-get install bind9 bindutils -y

1. Configure Cache NameServer

For configuring cache server we need to modify a file named.conf.options in /etc/bind/named.conf.options and uncomment and edit of forwarders and add IP address to your ISP (Internet Service Provider) or you can use any Open DNS or public DNS like Google's DNS (8.8.8.8, 8.8.4.4)

forwarders {
    8.8.8.8;
    8.8.4.4;
};

2. Configure Primary/Master Nameserver

Primary/Master Server stores all record

sudo vi /etc/bind/named.conf

Make sure that it contains the following lines and NOT commented:

include “/etc/bind/named.conf.options”;
include “/etc/bind/named.conf.local”;
include “/etc/bind/named.conf.default-zones”;

To add a DNS Forward and Reverse resolution to bind9, edit /etc/bind9/named.conf.local

sudo vi /etc/bind/named.conf.local

Create a zone file from template one.

sudo cp /etc/bind/db.local /etc/bind/db.myserver-lab.com

Edit file to your domain. It easy to remember to use.

sudo vi /etc/bind/db.myserver-lab.com    

Look like this:

sudo systemctl restart bind9

After you create the reverse zone, Now let's edit a file that copies from the template. Just like command bellow:

sudo cp /etc/bind/db.127 /etc/bind/db.10

10 is my start IP address number from my DNS server

sudo systemctl restart bind9

Finally, we have installed and configured the DNS server on Ubuntu successfully. Any questions just leave a comment and we will be glad to help you.