Guide to SSH Reverse Tunneling (pinggy.io)

It will be nice to compare and contrast it to VPNs.

Great, clear guide on SSH reverse tunneling for secure remote access!

great guide on SSH reverse tunneling, and the setup instructions for various operating systems are a fantastic addition

Nice guide. It fails to mention that the full form of the reverse port forward allows a remote bind address:

    ssh -R [bind-address:[remote-port]:][hostname]:[port] [user]@[remote-host]

Not specifying a bind address binds to all. Using localhost limits exposure.

And repeated use of -R ... for multiple reverse port forwards (might not have been mentioned, I didn't see it).

They don't mention how pinggy does what it does, and I'd be very cautious to use closed 3rd party binary for such a security needed tool. Edit: There's a FAQ https://pinggy.io/help/#faq

SSH is one of those swiss army knives which turns out to be much more useful than initially expected. The various port forwarding modes have bailed me out of a few tricky situations.