I have Debian based ARM board on which I have Ethernet controller eth0 with static IP 192.168.1.10 and 3G usb modem connected to the internet (ppp0). Ethernet controller is connected directly to other device (seismic recorder) which also has static IP 192.168.1.100.
ARM board initiates SSH tunnel to the central server so I can access it even when 3G IP is not public nor static.
What I need to do is to be able to connect (via SSH tunnel initiated by ARM board) from server to port 5000 of seismic recorder. How should I do that?