How to install DNS Bind9 on Linux?

“DNS is the phonebook of the internet, translating human-readable domain names into machine-readable IP addresses, enabling seamless connectivity across the globe.”

Install and Configure DNS Bind9 on Linux

Step 1: Install Bind9

Open a terminal and run the following command:

sudo apt update

sudo apt install bind9 bind9utils bind9-doc

Step 2: Configure Bind9

The primary configuration file for Bind9 is located at /etc/bind/named.conf.local. Open this file to add your DNS zones.

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

Add a Zone

Add the following lines for your zone configuration:

zone "example.com" {
    type master;
    file "/etc/bind/db.example.com";
};

Step 3: Create Zone File

Now create the zone file for your domain:

sudo nano /etc/bind/db.example.com

Add the following content to the zone file:

$TTL    604800
@       IN      SOA     ns.example.com. admin.example.com. (
                             2         ; Serial
                        604800         ; Refresh
                         86400         ; Retry
                       2419200         ; Expire
                        604800 )       ; Negative Cache TTL
;
@       IN      NS      ns.example.com.
@       IN      A       192.168.1.1
ns      IN      A       192.168.1.1

Step 4: Check Configuration

After configuration, check if there are any syntax errors:

sudo named-checkconf

Check the zone file:

sudo named-checkzone example.com /etc/bind/db.example.com

Step 5: Restart Bind9

sudo systemctl restart bind9

Step 6: Test Your DNS Server

Finally, you can test your DNS server using:

dig @localhost example.com

Learn More

To deepen your Linux knowledge, consider enrolling in the following course: