Does Ubuntu Have DNS Server?

As a user of Ubuntu, you might be wondering whether it has a DNS server or not. The answer is yes! Ubuntu does have a DNS server that you can use to manage your network's DNS resolution. In this article, we will discuss how to install and configure a DNS server on Ubuntu.

DNS, which stands for Domain Name System, is a system that translates domain names into IP addresses. This process is crucial in accessing websites and other online services. A DNS server is a computer that stores the DNS records for a domain and provides them to clients upon request.

Table of Contents

• Checking if DNS Server is Installed
• Installing DNS Server on Ubuntu
• Configuring DNS Server on Ubuntu
• Testing DNS Server on Ubuntu

Checking if DNS Server is Installed

Before you install a DNS server on Ubuntu, you need to check whether it is already installed or not. You can use the following command to check:

sudo systemctl status systemd-resolved

If the output shows that the DNS service is running, then Ubuntu already has a DNS server installed.

Installing DNS Server on Ubuntu

If the DNS service is not running on your Ubuntu machine, then you can install a DNS server using the following command:

sudo apt-get install bind9

This command will install the BIND9 DNS server on your Ubuntu machine.

Configuring DNS Server on Ubuntu

Once you have installed the DNS server, you need to configure it to work with your network. The configuration files for BIND9 are located in the /etc/bind directory. You can use a text editor such as Nano or Vim to edit these files.

1. Open the named.conf.local file in the /etc/bind directory using a text editor.

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

2. Add the following lines to the file to define the DNS zone for your network:

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

3. Save and exit the file.

4. Create a new file named db.example.com in the /etc/bind directory using a text editor.

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

5. Add the following lines to the file to define the DNS records for your network:

$TTL    604800
@       IN      SOA     example.com. root.example.com. (
                              2         ; Serial
                         604800         ; Refresh
                          86400         ; Retry
                        2419200         ; Expire
                         604800 )       ; Negative Cache TTL
;
@       IN      NS      ns.example.com.
@       IN      A       192.168.1.10
ns      IN      A       192.168.1.10

6. Save and exit the file.

7. Restart the BIND9 DNS server using the following command:

sudo systemctl restart bind9

Testing DNS Server on Ubuntu

To test your DNS server on Ubuntu, you can use the nslookup command. This command will query the DNS server for a specific domain name and return the corresponding IP address.

nslookup example.com

If the output shows the correct IP address for the domain name, then your DNS server is working correctly.

So, Ubuntu does have a DNS server that you can use to manage your network's DNS resolution. By following the steps outlined in this article, you can install and configure a DNS server on your Ubuntu machine.

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That's it for this post. Keep practicing and have fun. Leave your comments if any.