Before initiating a debug session using tunneling, you must ensure the correct port numbers are configured in the Debug Preferences page.
This procedure describes how to configure your Debug preferences to enable tunneling.
To configure Debug Settings for PDT :
1. Open the PHP Debug Preferences page by going to Window | Preferences | PHP | Debug.
2. In the "Debug Options" section, ensure the following default settings are configured:
The next step in creating a tunneling connection is to Set your Environment to be an Allowed Host.