There is a computer in a home running opensuse into which I would like to login.
As usual, the computer is connected wirelessly to the home’s router. I cannot control the router in order to direct incoming connections, say, on sshd port, to that computer.
Is there a way to log into that computer from outside?
The computer is fully under my control, as distinct from the home router. I know all relevant IP addresses. I can start any service on the computer, or start any command, or ask somebody to start a command while I am not at home.
Typically the router does NAT, so if you cannot control it to do port forwarding, you’re out of luck.
However if you have a server outside under your control, you can establish a persistent connection to that server, and set up a reverse ssh tunnel to your home computer. For this use the -R option:
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