To use port-forwarding service through a secure tunnel, you should define port forwarding rules for each TCP/IP application.

Moreover, make sure that the connection is established from the client application to the server application. For example, a POP3 client in your local machine connects to the mail server in the remote host, and an X11 client in the remote host connects to the PC X server in your local machine. It is helpful to identify the direction of the connection before configuring forwarding rules.

To add a new port-forwarding rule to a session:

1. Open the Forwarding Rule dialog box.
2. In the Type list, select a type of connection.
3. In the Listen Port box, enter or select a port to listen.
   NOTE: The client application should connect to the listen port entered here.
4. In the Destination Host box, enter the hostname or the IP address of the destination host in which the server application is running.
5. In the Destination Port box, enter or select the port listened by the server application.
6. Description, enter the description for this tunneling rule.
7. Click OK.
   Note: A newly created forwarding rule is not applied to the currently open session. To apply it dynamically, see the Instant Tunneling section. For more detailed information on each value, see Forwarding Rule dialog box.

To edit a port forwarding rule:

1. Open the Sessions dialog box.
2. Select a session to edit its port forwarding rule.
3. From the toolbar, click Properties.
4. From Category, select Connection.
5. For Protocol, select SSH.
6. From Category, select SSH, and then Tunneling.
7. Select a tunneling rule to edit.
8. Click Edit.

To remove a port forwarding rule:

1. Open the Sessions dialog box.
2. Select a session to remove its port forwarding rule.
3. From the toolbar, click Properties.
4. From Category, select Connection.
5. For Protocol, select SSH.
6. From Category, select SSH, and then Tunneling.
7. Select a tunneling rule to remove.
8. Click Remove.