Setting up the tunnel in PuTTY
1 Download Putty and save the .exe file to the local hard drive. You can download putty by clicking on the following link.
putty
2 Locate the putty.exe file and launch the software by double-clicking the icon. This will launch the PuTTY Configuration dialog box.
3 Click the Session category. In this category do the following:
1 Type the host name or IP address of the Web server that is running SSH in the Host Name text box.
2

Select the SSH protocol option.
3

Name the session in the Saved Sessions field.
4 Click Save.
 
4 Click the Connection category and then expand the SSH category and select Tunnels. In the Tunnels subcategory you will enter the Source port (local port) and destination information:
1

In the Source port field, enter an arbitrary local port number that is not in use (see Determining if a port is available for more information). An example of a Source port would be: 2021
2

In the Destination text box type the host name or IP address followed by a colon (:) and the FTP port number (port 21 is the default FTP port). An example of a Destination information would be: 12.02.0.10:21
3

Make sure the 'Local' option is selected.
4 Click Add.
 
5 Click the Sessions category and then click Save to save tunnel settings for the session.
6

Click Open to start an SSH session. Enter your user name and password when prompted. In order to FTP through the SSH tunnel using FTP Client, an SSH session must be in progress.

Note: A message may appear when connecting to a host for the first time. This warning occurs when connecting to a new host. This warning can also occur when changes have been made to a previously saved connection.

See how to Set up the FTP Client