How to change the DNS settings on a Asus RT-N66U router

This page shows how to change the DNS settings on the Asus RT-N66U router.

Other Asus RT-N66U Guides



What is the DNS setting on a Router

When you connect a router to the Internet it gets a few settings from your ISP automatically. One of the settings that the ISP sets in your router is the DNS setting. DNS stands for Domain Name System and it is used to convert Internet names into actual IP addresses. For instance, when you go to "google.com", your are really connecting to an IP address that is mapped through DNS to a number such as:

This mapping happens automatically every time you visit any page on the Internet.

Why Change Your Router's DNS Setting

Some ISPs choose to abuse the DNS system and map unknown names to servers that they control. This can be done in a way that you don't know it is happening since your router is getting its DNS settings from your ISP. For instance, if you have one of these ISPs who is hijacking your DNS, and you try to surf the web to "some-random-site.com" and "some-random-site.com" does not exist, you might get a page back from your ISP with local advertisements on it.

By changing your DNS setting in your router you will effectively change the DNS setting for every computer on your network. This is because when a device is connected to your network your router automatically hands out its own DNS settings to that device. This way you can protect your entire network from ISP hijacking with just one setting.

What Should I Change My DNS To

There are 2 really great DNS servers on the Internet that you can choose from right now: Google Public DNS and OpenDNS. If you are not sure which one to pick then just use Google Public DNS.

When you change the DNS settings in your router, you usually have to enter a Primary and a Secondary setting. The secondary is only used if the primary can not be located. Here are common settings:

If you want to use Google Public DNS, use the following settings:

If you want to use OpenDNS, use the following settings:

Login To The Asus RT-N66U

To get started configuring the Asus RT-N66U DNS page you need to login to your router. If you are already logged in you can skip this step.

To login to the Asus RT-N66U, follow our Asus RT-N66U Login Guide.

Change the DNS settings on a Asus RT-N66U

If you followed our login guide above then you should see this screen.

You begin on the Status page of the Asus RT-N66U. To change the Domain Name System settings, click the choice on the left side of the page labeled LAN, which is located underneath Advanced Settings.

On this new page, click the tab at the top of the page labeled DHCP Server.

Configure the DNS section of your Asus RT-N66U

You are now on a page similar to the one you see above. Scroll down until you come to the section labeled DNS and WINS Server Setting.

In the box specified DNS Server enter the primary IP address of the DNS server you have chosen.

Most routers have at least two spaces for the primary and secondary addresses. The Asus RT-N66U only has space for the primary address. Since you only rarely need the secondary address this shouldn't be a problem, but if you find it is, you may need a different router.

When you are done with the changes you wanted to make, click the Apply button at the bottom of the page.

Possible Problems when Changing your DNS settings

Most devices on your network will not begin using the new DNS settings until they have been rebooted. After rebooting a device you can go to it's network settings and verify that it is using the DNS servers that you specified.

Other Asus RT-N66U Info

Don't forget about our other Asus RT-N66U info that you might be interested in.

Rachel Bauer

Written by

Rachel Bauer is an owner and primary author for SetupRouter.com. She is available on Google+ and you can find more of her articles in the Networking section of our site.