Do I Need an Internal DNS Server?


Heather Bennett

Do I Need an Internal DNS Server?

If you’re wondering whether or not you need an internal DNS server for your network, you’re in the right place. In this article, we’ll explore the benefits of having an internal DNS server and help you determine if it’s a worthwhile investment for your organization.

What is DNS?

DNS stands for Domain Name System. It is a system that translates domain names, such as, into IP addresses, which are numerical identifiers used by computers to communicate with each other on a network.

Without DNS, we would have to remember and enter IP addresses directly into our web browsers every time we wanted to visit a website. This is not only inconvenient but also impractical considering the sheer number of websites available on the internet today.

The Role of an Internal DNS Server

An internal DNS server provides several advantages for organizations:

  • Efficient Network Traffic: By resolving domain names locally, an internal DNS server reduces the need for external lookups. This improves network performance and reduces internet bandwidth usage.
  • Enhanced Security: With an internal DNS server, you can implement features like DNS filtering and blocking to prevent access to malicious websites or inappropriate content.
  • Centralized Management: An internal DNS server allows you to have complete control over your organization’s domain names and their associated records. This simplifies management tasks and ensures consistency across your network.

When Do You Need an Internal DNS Server?

An internal DNS server becomes particularly beneficial in the following scenarios:

  • Large Networks: If your organization has a large number of devices and users, an internal DNS server can help manage and organize the network efficiently.
  • Internal Services: When hosting internal services like intranet sites, email servers, or file servers, an internal DNS server allows you to assign easily recognizable domain names to these services.
  • Improved Control: An internal DNS server gives you more control over your network’s domain name resolution, allowing you to customize and optimize it according to your specific requirements.

Setting Up an Internal DNS Server

If you’ve decided that an internal DNS server is right for your organization, here are some steps to help you get started:

  1. Evaluate Your Requirements: Determine the specific needs of your network. Consider factors like the number of devices, expected traffic volume, and security requirements.
  2. Select a DNS Server Software: There are various options available for DNS server software, such as BIND (Berkeley Internet Name Domain), Microsoft DNS Server, or PowerDNS. Research these options and choose one that best fits your needs.
  3. Install and Configure the Software: Follow the documentation provided by the chosen software to install and configure your internal DNS server.

    This typically involves setting up zones, records, and configuring network settings.

  4. Migrate Your Domain Names: Update your network devices and clients to use the new internal DNS server for name resolution. This may involve updating DHCP settings or manually configuring individual devices.
  5. Test and Monitor: Once everything is set up, thoroughly test your internal DNS server to ensure proper functionality. Monitor its performance and make necessary adjustments as needed.


An internal DNS server can bring various benefits to your organization, including improved network performance, enhanced security, and centralized management. If you have a large network or host internal services, an internal DNS server becomes even more valuable. By following the steps outlined above, you can set up an internal DNS server that meets your specific requirements.

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