Ubiquiti Unifi

To troubleshoot problems it is important to understand the components involved in the captive portal user authorization process and the interactions between them.

Traffic Flow

Here is the traffic flow in the case of Ubiquiti Unifi:

Client Isolation

The client isolation setting on Unifi controller has been known to lead to this error when trying to access the captive portal:

Hotspot login cannot open the page because the network connection was lost

To prevent it disable client device isolation in WiFi settings.