There are many reasons to change the DNS servers assigned by your ISP. One of them is if you experience a slow internet connection. Many complain that the default DNS servers provided by the ISP are sluggish and slower compare to Google Public DNS for example. In this tutorial, you can learn how to change the DNS servers on Zyxel router.

In the following tutorial, you can change the default DNS servers provided by Unifi to new DNS servers like Google Public DNS, OpenDNS, and CloudFlare DNS servers which I provided at the end of the tutorial.

Note: This tutorial is done on Zyxel router model EX3220-T0, which is the default router provided by Unifi for subscribers with speeds 100Mbps and above.

See also 7+ Free safe DNS Servers for family.

How to change Unifi DNS servers on Zyxel router

1. Open any internet browser.
2. Go to http://192.168.0.1/.
3. Enter your username and password and hit Enter. The default is as follows:
   • Username: tmadmin
   • Password: Adm@XXXX (XXXX is the last 4 digits of the router MAC address)
4. Click on the three-horizontal lines located at the top right corner.
5. Click Network Setting.
6. From the sub-menu, select Home Networking.
7. Scroll down to IPv6 DNS Values.
8. Change all IPv6 DNS Servers 1 & 2 from From ISP to User Defined.
9. Enter the new DNS in the empty box next to it.
10. For DNS Query Scenario, select IPv4/IPv6 Server.
11. Once done, click Apply to save the changes.

If you don’t know which DNS servers to use, the following are some of the recommended free DNS servers for you.

Recommended free DNS servers

Here are some free DNS for you. Depending on the setting you choose in Step 10 above, you can enter the IPv4 or IPv6 DNS accordingly:

1. Google Public DNS

Google Public DNS needs no introduction. It is the most popular free public DNS. Google promises a faster browsing experience, improved security, and accurate results.

	IPv4 version	IPv6 version
Primary DNS	8.8.8.8	2001:4860:4860::8888
Secondary DNS	8.8.4.4	2001:4860:4860::8844

2. OpenDNS

OpenDNS is one of the most reliable DNS, they claim 100% reliability and up-time, and is used by tens of millions of users around the world. OpenDNS offers two sets of free public DNS servers including one for parental controls.

	IPv4 version	IPv6 version
Primary DNS	208.67.222.222	2620:119:35::35
Secondary DNS	208.67.220.220	2620:119:53::53

3. CloudFlare DNS

Cloudflare claims their 1.1.1.1 is the “internet’s fastest DNS directory”. With CloudFlare DNS servers, they claim they will never log your IP address, never sell your data, and never use your data to target ads. 

	IPv4 version	IPv6 version
Primary DNS	1.1.1.1	2606:4700:4700::1111
Secondary DNS	1.0.0.1	2606:4700:4700::1001

4. Other option – Namebench

If you’re looking for other options, previously I have posted a tutorial on how to find the fastest DNS server based on your location. This method will be using the Namebench app which will scan through your area and help you find the nearest and fastest DNS servers. You can read how to improve internet speed with Namebench.

If you encounter any issues while setting up the new DNS servers, let me know in the comment below.