How to manually set the DNS server address for InRouter305?

How to manually set the DNS server address for InRouter305?

Log in to the web GUI ->Network ->Interface Settings, select the interface to be configured (such as cellular port), click "Edit", enter the preferred DNS (such as 223.5.5.5) and backup DNS (such as 223.6.6.6) in the "DNS Server" column, save the application and it will take effect.