1. Open the router's configuration page
The default location is http://192.168.0.1 but may vary.
2. Under Setup, open up LAN Setup
3. In the DNS boxes under "Client Lease Time", enter the OpenDNS DNS addresses
Enter the following three DNS IPs into all three boxes as outlined in the image below: 18.104.22.168, 22.214.171.124, and 126.96.36.199
4. Save your settings by clicking "Save Settings"