Hi,
Similar problem here. We noticed he first connection is sent to device.arubanetworks.com, then to device-eu.central.arubanetworks.com (this will probably change by location, I'm in Euope), and the next requests go to AWS addresses - IP addresses, not FQDNs.
This might be your problem - you may want to disable authentication for those addressess as well as *.arubanetworks.com. The addresses I've seen so far:
52.57.173.160
198.74.54.240
18.196.96.131
I'm in the process of trying several authentication methods in ProxySG but so far everything fails.
ArubaOS versions 8.3.0.0 and 8.5.0.3
ProxySG version 6.7.4.5
Authentication methods tested: Auto, Origin, Origin-IP, Origin-Cookie, Origin-Cookie-Redirect, Proxy, Proxy-IP, Form-IP, SG 2.0
Anyone with some insights?
Mike
edit: corrected "device-eu.arubanetworks.com" to "device-eu.central.arubanetworks.com", added auth methods tested