This page shows how to change the DNS settings on the Asus RT-AC87U 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.
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.
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:
To get started configuring the Asus RT-AC87U 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-AC87U, follow our Asus RT-AC87U Login Guide.
If you followed our login guide above then you should see this screen.
By now you have logged into the Asus RT-AC87U router and are on the home screen. To change your DNS server settings click the option in the left sidebar labeled LAN.
This takes you to a new page where there area list of tabs running along the top of the page. Click the one titled DHCP Server.
You should now see a page very similar to the one you see in the screenshot above.
Now locate the DNS Server and enter the new one you wish to use.
It's that simple! You are finished. Don't make any other changes to this page. Just click the Apply button to save your changes before leaving this page.
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.
Don't forget about our other Asus RT-AC87U info that you might be interested in.