How To Install And Configure Dns Server In Linux?

1. Install BIND

Install the BIND package by running the following command:

sudo apt-get install bind9

2. Configure BIND

Once the installation is complete, you need to configure BIND. The main configuration file of BIND is ‘/etc/bind/named.conf’. This file controls all the settings for the DNS server.

Open the file in a text editor and make the following changes:

a) Change the ‘listen-on’ directive to the IP address of the DNS server.

b) Change the ‘allow-query’ directive to the IP addresses of the hosts that will query the DNS server.

c) Change the ‘allow-recursion’ directive to the IP addresses of the hosts that will be allowed to perform recursive queries.

d) Change the ‘forwarders’ directive to the IP addresses of the DNS servers that will be used for forwarding requests.

3. Create Zone Files

Once you have configured BIND, you need to create the zone files for your domains. Each domain will need its own zone file. The zone files are located in the ‘/etc/bind/zones’ directory.

Create a new file for each domain and add the appropriate records for that domain.

4. Reload BIND

Once you have created the zone files, you need to reload BIND. You can do this by running the following command:

sudo service bind9 reload

5. Test the DNS Server

Once you have reloaded BIND, you can test the DNS server by using the ‘dig’ command. This command will allow you to query the DNS server to see if it is working correctly.

For example, you can use the following command to query the DNS server for the ‘A’ record of a domain:

dig @<dns_server_ip> <domain> A

If the DNS server is configured correctly, it should return the appropriate ‘A’ record for the domain.