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this post was submitted on 27 Nov 2024
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Your ability to SSH in the machine depends on the network connectivity. Knowing the IP does nothing if the SSH port is not forwarded by the router or if you don't establish a reverse tunnel yourself with a public host. As a company you can do changes to the client device, but you can't do them on the employee's network (and they might not even be connected there). So the only option is to have the machine establish a reverse tunnel, and this removes even the need for dynamic DNS (which also might not work in certain ISPs).
The no-sudo is also easier said than done, that means you will need to assist every time the employee needs a new package installed, you need to set unattended upgrades and of course help with debugging should something break. Depending on the job type, this might be possible.
I still think this approach (lock laptop) is an old, ineffective approach (vs zero-trust + remote data).
You could implement a ssh tunnel every time it is online. Then you just use a reverse tunnel through that connection.
Yeah, that's what I wrote too, but that is still a very fragile way. For once, you depend on a network connections, or in the local firewall not blocking you etc.
Reactive, on-demand ssh is something you can do for tech support, not for security imho.
True, forgot about that.
Alternatively yeah some system to load the data online, autodelete after a while of not logging into something.
But the question really is "why?"
Disk encryption should deal with everything. Secure boot and usbguard are useful anyways.
Disk encryption is a control against lost or stolen device and malicious physical access (kinda). Storing the data elsewhere is more a control (or the basis for controls) against malicious insiders.