Kind of hijacking this conversation, but is there a service-mesh-like tool that allows reverse TCP tunneling via a central gateway server, kind of like services like ngrok / localtunnel just with all the bells and whistles of a modern service mesh? My use-case is that I want to be able to deploy a HTTP service across a heterogeneous set of distributed host, many of which don't allow any incoming connections / are behind NAT, and I am looking for a good solution to have these boxes connect out to a central gateway server which doesn't involve OpenVPN or SSH reverse tunnels.