How Do I Add a DNS Server to My Cisco Router?


Scott Campbell

Welcome to this tutorial on how to add a DNS server to your Cisco router. In this article, we will guide you through the process step by step, ensuring that you have a clear understanding of each stage. Let’s get started!

What is a DNS Server?

Before we begin, let’s briefly discuss what a DNS server is. DNS stands for Domain Name System, and its primary function is to translate domain names into IP addresses. Essentially, it acts as a phonebook for the internet, allowing users to access websites by typing in user-friendly domain names rather than complicated IP addresses.

Why Add a DNS Server to Your Cisco Router?

You might be wondering why it’s important to add a DNS server to your Cisco router. Well, by configuring your router with an appropriate DNS server, you can improve the speed and reliability of your network connections. Additionally, it allows you to implement custom rules for name resolution and provides better control over your network’s security.

Step 1: Accessing the Router

The first step is to access your Cisco router’s configuration page. Open your favorite web browser and enter the default IP address of your router in the address bar.

Typically, it is something like Press Enter and you should see the login page for your router.

Step 1a: Logging In

Enter the username and password provided by your internet service provider (ISP) or the administrator of the router. If you haven’t changed these credentials before, they are usually set as “admin” for both username and password.

Step 2: Navigating to DNS Settings

Once logged in, look for the “Settings” or “Configuration” tab in the router’s interface. Within this section, you should find a subsection labeled “DNS” or “Network Settings.”

Step 2a: Primary DNS Server

In the DNS settings, you will see fields for entering the primary and secondary DNS server addresses. The primary DNS server is the first server your router will use to resolve domain names into IP addresses. Enter the IP address of your preferred DNS server in this field.

Step 2b: Secondary DNS Server

If your primary DNS server becomes unavailable, your router will use the secondary DNS server for name resolution. Enter the IP address of a secondary DNS server in this field. It is recommended to use a different provider than your primary DNS for redundancy.

Step 3: Saving and Testing

After entering the desired DNS server addresses, save your changes by clicking on the “Apply” or “Save” button at the bottom of the page. Your router will then apply the new settings, and you should see a confirmation message.

To test if your new DNS settings are functioning correctly, open a web browser and try accessing different websites. If they load without any issues, congratulations! You have successfully added a DNS server to your Cisco router.


Adding a DNS server to your Cisco router is a simple yet effective way to enhance your network’s performance and security. By following the steps outlined in this tutorial, you can ensure that your router is using reliable and efficient servers for name resolution.

We hope this article has helped demystify the process of adding a DNS server to your Cisco router. Happy networking!

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