Hi! I had a ploblem, when my Vcenter Server 6.5 (on Windows Server) whas restarted.
The default page https://x.x.x.x shows the message:
Access to x.x.x.x was denied( HTTP ERROR 403).
I always acces trhough https://x.x.x.x/ui (html)so I receive the message:
503 Service Unavailable (Failed to connect to endpoint: [class Vmacore::Http::LocalServiceSpec:0x04e60a78] _serverNamespace = /ui action = Allow _port = 8308)
I restart the vcenter and them services many times, but I have no success.
The Vmware documentationi help us how to fix the issue like this on vmware virtual apliance. Not on Window Server.