How to set up two servers behind one single public IP

Solution

Change BasePort for one server. (The WebPort follows automatically.)

1. In Symphony Client, from the Server menu, select Manual Configuration Editor. The Server Configuration dialog box appears.
2. At the top, click the Add a new setting... area. The Type, ID, Section, Key, and Value fields appear.
3. Enter the following:

Type: Server
ID: <5000 or 5001>
Section: Main
Key: BasePort
Value: 40000 (or 30000 or 60000)

4. Click Apply.
5. Click Close.