I think in general reverse SSH tunnels can be extremely risky and very handy. I've emailed friends scripts with ssh keys that were: "Click and open a tunnel to

I think in general reverse SSH tunnels can be extremely risky and very handy. I've emailed friends scripts with ssh keys that were: "Click and open a tunnel to my server", I could then help them (i.e. to save images from their raspberry pi camera directly to webdav. Or I could work on friend's raspberry pi proximity sensor in his water tank...) Very handy, very risky.