SSH bridge between two dynamic-ip pcs through third static-ip pc for jupyter notebook

Solution 1:

While it is doable to set up SSH with the jumper box (machine with static IP), I'd personally recommend to set up Zerotier on all three machines: then, one simple command will make the Jupyter-server-port available "locally" as each of the machines will have a "static" IP.

Before I learned about Zerotier, I was hosting exactly what were describing. Here are a few hassles that I am aware of.

1. On the host for Jupyter Server, a cron-job needs to run first to make the port available to the jumper box;
2. On the client machine, it is nevertheless needed to fetch the port from the jumper machine.
3. If anything in between fails, chances are that the JupyterLab instance will stop working. It is yet another hassle to troubleshoot what went wrong.

With a Zerotier setup, only the #2 step is necessary, and the latency is comparable to jumping through multiple SSH tunnels (and reverse-tunnels).