Use putty's SSH tunnel to connect to Oracle

Use putty's SSH tunnel to connect to Oracle
1. Set SSH tunnel on putty of localhost, for example:
In this way, the port 1511 connecting to the local machine will be forwarded to port 1521 of remoteIP. Click "Add", and then log on to the remoteIP through SSH. The SSHtunnel is created. On the local machine netstat-a | find "1511", you can see that port 1511 has a linstener listener.
TCP 127.0.0.1: 1511 CNHSHAKER1NB912: 0 LISTENING local configuration tns xxxdb =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP) (HOST = localhost) (PORT = 1511 ))
)
(CONNECT_DATA =
(SERVICE_NAME = XXservice)
)
) Note that the port 1511 of the specified localhost is used. Then, use sqlplus user/pwd @ XXXDB to connect to oracle on the target tunnel machine.