How to change the DNS settings on a Dlink DSA-5100 router

This page shows how to change the DNS settings on the Dlink DSA-5100 router.

Other Dlink DSA-5100 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 "", 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 "" and "" 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 Dlink DSA-5100

To get started configuring the Dlink DSA-5100 DNS page you need to login to your router. If you are already logged in you can skip this step.

To login to the Dlink DSA-5100, follow our Dlink DSA-5100 Login Guide.

Change the DNS settings on a Dlink DSA-5100

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

Starting from the Welcome page of the Dlink DSA-5100, click the choice in the left side bar labeled System Configuration, then under that Private LAN Configuration.

Configure the DNS section of your Dlink DSA-5100

The page you see above is the page you are taken to, in the section labeled DHCP Server Configuration find the box labeled Primary DNS Server. In this box, enter the primary address of the DNS Server you want to use. Just below that is the Secondary DNS Server, enter the secondary address of the DNS Server. When you are finished, click Apply.

There is one more page to fill in the DNS Server information. Click the link to the left labeled Public LAN Configuration, under the main heading of System Configuration.

This page looks almost identical to the previous one. If the router has automatically filled in these boxes, then you are finished. If not, find the box titled Primary DNS Server and again enter the primary address of the DNS Server you picked earlier. In the Secondary DNS Server box enter the same secondary address you used on the previous page.

Click Apply.

You did it, congratulations!

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 Dlink DSA-5100 Info

Don't forget about our other Dlink DSA-5100 info that you might be interested in.

Rachel Bauer

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