Jailed might be OK for the general audience vs technical people but does it come with a package manager that lets you install things such as OpenSSH, assorted open source VPN daemons, email clients, etc... or do such things have to be shimmed in or run from /home or break OS updates? Or do such things have to be purchased or installed through an app store like on cell phones? If so it may still be usable. I rebooted a telco mainframe switch using Telnet from a Nokia 9000 back in the day whilst on call.