What Is Bind9 DNS Server?


Scott Campbell

What Is Bind9 DNS Server?

The BIND9 DNS server, also known as the Berkeley Internet Name Domain, is a widely-used open-source software that provides domain name resolution on the Internet. It is the most commonly used DNS server software on Unix-like operating systems.

Why Use BIND9 DNS Server?

There are several reasons why BIND9 is a preferred choice for many organizations:

  • Flexibility: BIND9 offers a high degree of flexibility and configurability, allowing administrators to customize DNS settings according to their specific needs.
  • Reliability: BIND9 has a proven track record of stability and reliability, making it suitable for critical infrastructure and high-traffic websites.
  • Security: BIND9 incorporates various security features, such as access controls and cryptographic mechanisms, to protect against unauthorized access and DNS-based attacks.
  • Scalability: BIND9 is designed to handle large-scale deployments and can efficiently manage thousands of zones and millions of records.

Key Features of BIND9 DNS Server

BIND9 offers a wide range of features that make it a powerful DNS server solution:

  • DNSSEC Support: BIND9 supports Domain Name System Security Extensions (DNSSEC), which provides an additional layer of security by digitally signing DNS records.
  • DNS Caching: BIND9 includes caching functionality that helps improve performance by storing frequently requested domain information locally.
  • DNS Views: BIND9 allows administrators to create different views of the DNS namespace based on factors such as client IP address, providing customized responses.
  • Dynamic DNS: BIND9 supports Dynamic DNS (DDNS), enabling automatic updates of DNS records when IP addresses change.

Installation and Configuration

To install BIND9 on a Linux system, you can use the package manager specific to your distribution. For example, on Ubuntu or Debian, you can run the following command:

sudo apt-get install bind9

After installation, the configuration files for BIND9 are located in the /etc/bind/ directory. The main configuration file is named.conf.

To configure BIND9, you need to modify the named.conf file and create zone files for your domains. The configuration process involves defining your server as a master or slave, specifying zones and their properties, and setting up DNS records.

Example named.conf Configuration:

options {
    // Global options

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

zone "1.168.192.in-addr.arpa" {
    type master;
    file "/etc/bind/zones/192.1.rev";

This is just a basic example to illustrate how to define zones in named. You would need to create zone files with appropriate DNS records for your specific domains.


BIND9 is a powerful and versatile DNS server software that provides domain name resolution services on the Internet. Its flexibility, reliability, security features, scalability, and support for advanced functionalities like DNSSEC make it a popular choice among organizations.

By understanding the key features of BIND9 and following proper installation and configuration procedures, administrators can effectively deploy and manage DNS infrastructure for their networks.