Go to the DNS tab to see the primary and secondary DNS address your Mac is using.

Find the area of configuration in which DNS server settings are specified and replace those addresses with the Cisco Umbrella IP addresses. Select your WiFi or Ethernet connection and click Advanced.

Click the + button to add your new DNS Server and enter the IP address: 198.

In your browser, enter the IP address to access the router's user interface and enter your password. So let us see How to Fix DNS Server Not Responding Error on Windows 10.

To change your settings on a typical router: Click the Advanced button in the lower right corner of the Network window. Select your network interface from the left side (Wi-Fi or Ethernet for example), 4. For authoritative information, see the vendor documentation. Go to the Apple menu and select System Preferences. This procedure might not apply for your OS, router, or device. The process for changing your DNS settings varies according to the operating system and version (Windows, Mac, or Linux) or the device (DNS server, router, or mobile device). For more information and instructions to configure a typical Windows or Macintosh computer, see Computer Configuration.

Instead, you can configure each of your computers by installing the Umbrella roaming client or configuring the DNS server addresses on each computer.

If you are using such a device, you will not be able to configure it to use Umbrella. Note: Some ISPs hard-code their DNS servers into the equipment they provide.

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