[denkmoon]

In this case it really is easy. It's just wireguard with some NAT negotiation sauce and convenient auth layer.

[gzread]

You're doing the Dropbox rsync comment.

[ZoomZoomZoom]

To be fair, only the mesh part of the problem is quadratic. Reliable hole punching is not that easy either. As far as I know, there is a level of circumvention in case the unwrapped WG is blocked too.

The integrated service is very valuable and obviously genuinely popular.