$ ssh -L 1234:10.0.0.16:4321 andreas@10.0.0.32 -N ==> Connect to 10.0.0.32 (Workstation) and forward all traffice over port 1234 to 10.0.0.16:4321 (NAS). NAS has to open the port first.
ssh Tunnel schlägt fehl
SSH Tunnel mit Linux
SSH-Tunnel bauen und sicher surfen
Quick-Tip: SSH Tunneling Made Easy