The local Firewall on Surface Hub?

Hi,

Not sure about others, but I was a slightly surprised when I started the call on Surface Hub and got the following picture on front of me:

After that I feel that the calls stop working. The device is online (green circle), but when joining to meeting it gives classical error: "Sorry, we couldn't connect you".

Anybody knows more about this FW? Is there some ways to accessing it. It have the logs, but the length of the logs were around minute or two, so that could not help too much.