Earn a 50% discount on the DP-600 certification exam by completing the Fabric 30 Days to Learn It challenge.
Is there a guide or FAQ on requirements for firewall configuration to enable on-premises data refresh?
erikskov,
You shouldn't need to open a port in your firewall at all for the personal gateway. The connector uses the Azure Service Bus. See here for more details.
As long as you have port 80 open, you should be good.