SSH Tunnel – Local and Remote Port Forwarding

Connecting to a database behind a firewall

ssh -L 9000:localhost:5432 [email protected]

Remote port forwarding

ssh -R 9000:localhost:3000 [email protected]

sudo nano /etc/ssh/sshd_config
GatewayPorts yes
sudo service ssh restart

References
http://blog.trackets.com/2014/05/17/ssh-tunnel-local-and-remote-port-forwarding-explained-with-examples.html