Should CMS server be connected to internet in case of on-remise Android licenced?

Hi all,
we have a pool of android licences and get the on-premise licencing module. Everything run smooth so far.
Should the CMS server remain connected to internet ? because our customer (banking sector) hate to connect their servers to internet.
In case connection to internet is compulsory, what is the specific needed URL to coonect to and is there any specic access port that is used ?
Please help.

No, just Xibo device (player) need Internet access to validate their license (at least once every 30 days).

You’ll find all the information you need here: