On the Tunnel Server page you have two fields to fill out:
Client: Enter the Node Name of the client you want to add.
Pwd: Enter a password for this client to use on their Tunnel Client page.
The Net field is automatically assigned.
Click on the Add button and a new line will be created. This line will have the Client name and Pwd that you entered and also list a Net or network IP address. These three fields are necessary when setting up the Tunnel Client page.
After setting up the Tunnel Client page, return to the Tunnel Server page and put a check mark in the Enabled? check box. Finally, click on the "Save Changes" button.
Note: Make sure that port 5525 can get to the node that is running the tunnel Server!