I know there are plenty of comments on questions similar to mine but none has a clear technical implementation of the solution.
The scenario is the following: windows --> [bastion] --> jupyter (WebUI)
I would like to connect: - from my local Windows browser - using putty tunneling through the bastion - to the private EC2 instance running Jupyter (WebUI)
Jupyter (WebUI) is accessible on port p.p.p.p:10000 which is only open to my bastion b.b.b.b.
My key files are "my_key.ppk" or "my_key.pem".
Please let me know if you need further details.