We have a customer with a central site (aruba 7210 + ucopia VM installed) where we can use the captive portal Ucopia.
But on the others sites (linked by MPLS) with their own controllers, I want to use the login page and the filtering of the VM Ucopia on central site. Like a proxy.
But I don't find how to do it on Aruba. Is-it possible to use a external portal? There is a documentation just for Iap, not for controllers.
Could you please specify more details about your architecture (diagram if possible)? I understood that you have a Master - Local CTRL architecture. In that case you only need to configure the external captive portal on the Master, who will sahre it with the locals.