rpi4b_tunx.x forwards client's ssh port to a port e.g. 3001 on the remote host. The user can then login into the client by executing the following command on the remote host.
ssh -p 3001 localhost
This allows a client with dynamic IP to become accesible through the remote host.
NB
- ver 0.4 suits those with no sudo access on remote host
- ver 0.3 requires
netcatinstall