Domain Name Systems (DNS) are like the Internet’s phone book. They maintain a directory of domain names (like "google.com") and translate them to IP addresses.
How do I change my DNS?
Note: To change advanced settings, you’ll need to use the Google Wifi app, even if you normally use the Google Home app to manage your device. Download the app from the Play Store (Android) or App Store (iOS).
- Open the Google Wifi app .
- Tap the Settings and actions tab Network & general.
- Under “Network,” tap Advanced networking DNS.
- Choose your desired DNS. If you choose a custom DNS, enter a primary server and secondary server address.
- Tap Save.
When you type a URL into your browser, your browser looks up that domain name in DNS. For example, if you type www.google.com into your browser, your browser asks DNS for Google’s IP address. DNS returns the IP address assigned to Google’s domain name (e.g. 18.104.22.168). Your browser then connects to that IP address, taking you to the webpage.
A helpful analogy is your phone. When you want to call your mom, you select “Mom” from your contact list. Your phone associates the name “Mom” with her phone number and dials it for you.
Google Wifi and Google Nest Wifi gives you three options.
- Automatic: This uses Google Public DNS or your ISP’s DNS if certain conditions are met. Automatic is the default DNS selection.
- ISP’s DNS: This uses your ISP’s DNS.
- Custom: This lets you specify a custom or third-party DNS. Custom DNS supports 2 distinct lists of servers, primary and secondary for both IPv4 and IPv6.
Note: Be careful if you choose to use a custom DNS. If you specify a DNS that doesn't work (either the wrong IP or the DNS goes down), none of your connected devices will be able to access the Internet (unless they are provided manual-override DNS entries). Your router or primary Wifi point itself will still be able to connect to the Internet, allowing you to revert to a different (working) DNS -- assuming the device that’s running the Google Wifi App has access to a different connection to the Internet (one that’s not dependent on your router or primary Wifi point, like your mobile phone’s cellular network).