Online Documentation for SQL Query for PostgreSQL
Setting HTTP tunnel options
The HTTP Tunneling section of the Database Registration Info dialog allows you to enable/disable HTTP tunneling for connection to the database and set the necessary HTTP tunneling parameters.
Connect through the HTTP tunnel
Select this option to access PostgreSQL server through the HTTP protocol in case of Internet access through HTTP proxy only, or if the server does not allow direct connections to PostgreSQL, but allows HTTP connections.
In order to use HTTP tunneling for the connection, you need to upload the tunneling emsproxy.php script to the webserver and specify the URL in the corresponding box in the following format: http://webserver_address/emsproxy.php
See HTTP connection properties for details.
Please note that either SSH tunneling, or HTTP tunneling can be used for one connection, but not both types simultaneously.