How can I see which devices are connected right now?

Open a client, then Authentications → Sessions. It lists what is connected to that client's network at this moment: the device, the address it is holding, which network or switch port it is on, how long it has been connected and how much it has moved. All sessions beside it is the history — everything that has connected and left, with the reason it ended.

This is a different question from the authentication log next to it, and the two are worth keeping apart in your head. The log says a decision was made: this certificate was accepted at 09:53, and that never changes. A session says a connection is still up, which is true until it is not. A laptop that authenticates once and stays connected all week is one line in each.

Where it comes from. Your client's own equipment tells us, through RADIUS accounting — it sends a message when a device joins, one every five minutes while it stays, and one when it leaves. Passbeam keeps one row per session and moves it forward, rather than a pile of records you would have to reassemble.

It needs one thing configured, and it is the same two lines you already added for authentication. See “Sessions are empty. What do I need to turn on?”.

Four states, and only the first two are the equipment's own word. Connected means nothing says otherwise. Ended means it told us the device left, and says why. No recent update means equipment that had been reporting every few minutes has gone quiet for longer than it should — usually an access point unplugged or a switch rebooted without saying so. It does not mean the device left, because we genuinely cannot know that, and a page that claimed it would be guessing.

Superseded is the fourth, and it is our conclusion rather than a report. Some switches open an accounting session for one stage of an authentication — a MAC check, say — and then abandon it when the device passes the real one a few seconds later, never sending a stop. Left alone, those pile up in the open list one per device per day. When a newer session arrives for the same device on the same switch, Passbeam closes the older one and marks it this way, so you can tell it apart from a session the equipment actually ended.

Each row can also carry a Disconnect, which ends that session on the customer's own equipment. It needs a connector at the site — see “How do I disconnect a device that is already connected?”.