The following prerequisites must be met in order to use the Cisco Umbrella roaming client successfully. Ensure that prerequisites are met to avoid conflicts and potential problems.
- Chrome OS devices, such as Chromebook, running version 55 or newer.
- Chrome browser on OS X, Windows, and Linux.
- Devices running variations or third-party distributions of Chrome OS, such as neverware CloudReady.
The Cisco Umbrella Chromebook client uses the following ports:
53 (TCP + UDP)
Used for EDNS Queries
HTTPS - Used for registration
Used for the Trusted Network Detection feature.
In the DHCP server, configure the Cisco Umbrella IP addresses (220.127.116.11 and 18.104.22.168) as the DNS nameserver addresses for all Chromebooks. Communication to these addresses must be allowed on Port 53 in all applicable firewalls and other security perimeter devices in use in your networks.