My start up is building a computer which runs debian linux and some custom programs. What is the best way to remotely access the machines without the user having to do anything?
Our product is currently in an early stage where the update process is not well tested and could break itself. I am looking for an easy way to access the machines remotely via SSH. The machines are behind standard home firewalls and don't have a static IP or anything of this nature.
My thought was using something along the lines of a init script which runs a reverse SSH such as:
ssh -N -R 2222:localhost:22 firstname.lastname@example.org
The thing I don't like about this is that each machine has to have its own port and user. Also even if I don't need the SSH connection it is open and traffic used.
I am thinking of writing an application on the server which provides a simple webpage the clients check every x minutes using an http request whether it needs to connect via SSH. If it does the server script creates an account and tells the client what port and user to use.