SSH port forwarding disabled¶
SSH port forwarding is disabled by Jean Zay sys-admin for security reasons.
SSH port forwarding is also called SSH tunneling sometimes (maybe a less accurate term). This the kind of command you run when you are using SSH port forwarding:
base ❯ ssh -N firstname.lastname@example.org -L 12345:jean-zay3.idris.fr:12345 # jean-zay
If you are trying to use it on Jean Zay you will get this kind of errors (in
the console you run the
ssh -L command when you try to access the local port):
channel 2: open failed: administratively prohibited: open failed
One use case for SSH port-forwarding is to start a Jupyter notebook server on a
remote machine and open it locally in your web browser using a URL like this:
http://localhost:8888. For this Jupyter notebook use case, Jean Zay provides
their own solution, see
for more details.