Hi cjoseph,
I first tried to connect my AP to the central without modify my firewall (the port 443 is allowed) and the ap cannot register on the aruba central.
Then I launch a wireshark without any firewall and the device.arubanetworks.com seems to communicate with the AP with dest ports : 53170 and src ports : 443.
Then my AP finally go up in the central but do not take the configuration.
Then I double check my wireshark capture and the app1.central.arubanetworks.com seems to comunicate to my AP with the dest port : 52258 and then it's work.
I hope I've been clear with my explanation, maybe I did something wrong.
Regards,
Lucien