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Panels
Usually each job at home has its own box, each running panel: a router, a NAS, an app server. Panels on one network find each other, and once paired they work as one: one list of accounts, every box's problems on each Home, and any box managed from any other. Panels at different places find each other through a relay.
This page, under Settings › Other panels, is for pairing and sharing. How each panel is, at a glance, is Fleet, in the menu.
Pairing
An administrator shows a code on one panel (Show a code, or panelctl pair code on its console) and types it on the other. The code is ten characters, good for ten minutes and once. A press copies it.
The two check each other's keys as they meet. Afterwards each sees the other: its name, address, version, modules, whether it answers, and its problems — which are on your Home too. Either can unpair.
Seen through another panel
A panel paired with one you are paired with is seen too, and so on down the chain: the router paired with the NAS, and the NAS with the media box, and the router sees the media box. It is listed under Seen through another panel, with which one and how many panels away, and its problems are on Home. Seeing is all it is: no accounts, no managing.
Where the two cannot reach each other — the media box behind the router, say — the panel between them carries the asking. Unpair any link in the chain and the panels beyond it are no longer seen, within a minute. One that is also on this network can be paired with directly (Pair directly…), for sharing accounts with it.
Sharing accounts
A pairing only sees until an administrator on each side agrees to share accounts: one shows a code to share accounts with the other, which types it under Share accounts.
Before anything is shared the page lists every account the two have that differs, and you choose whose to keep. Then accounts, roles, passwords, second factors and SSH keys are the same on both: a change on one reaches the other within a second. Stopping, from either side, keeps every account on both. A second factor's code used on one panel can't be used again on another, and wrong codes count on all of them: five in all lock the account.
Managing another panel
With a panel that shares accounts, the switcher beside the logo makes the whole page that panel's — its menu and its pages — under an amber band, with Back. Your browser only talks to this panel, which carries the requests on, so a panel your browser cannot reach can still be managed.
Phones
Phones paired with a panel are listed under Phones: whose, when paired, when and where last seen. Revoking one ends its sessions at once.
One update for all
Once a panel runs a release and it is kept, a panel sharing accounts with it fetches that release over their link and offers it, on Home and Maintenance. Install and Keep stay yours.
This panel
The certificate's fingerprint, to compare with what a phone shows the first time it connects.