[grace-baker Hexnode 26 November 2019 grace-baker Moderator]

Hey, Thanks for reaching out to us.

You would need to keep the following ports open to enable the Remote View feature.
Port 80: The default application port used during the installation of Hexnode MDM
Port 443:Used for secured and encrypted connection between mobile devices and Hexnode MDM
Port 3478:TCP and UDP
Port 5349:TCP

Kindly refer the link for more info. Hope this helps!

Cheers!
Grace Baker
Hexnode MDM