Setting up a secure tunnel with SSH within a SSH tunnel for services.  you have a server running a service on port 567 and now you  want to access the service in a secure way and not unencrypted over the network. Now you can  map the remote port 567 to a local port, for example

Lets  your server domain name is smartproteam.com and  username is admin

ssh –NfL 789:smartproteam.com:567 admin@smartproteam.com

After providing the password for you account on the remote machine you can now access the remote service on port 567 on your local port 789