The module provides sending sms via gateway and gateway can be placed behind proxy. Module consists of drivers, each can communicate with some SMS gataway implementation.
Now these implementations (drivers) are available:
URL of SMS gateway is returned by a script defined in application properties. The script returns URL in "string" and CzechIdM call the GET method with this URL. The script composed URL with all necessary parameters like username and password for gateway, text message, number, etc… CzechIdM itself handles the communication including a proxy, security (https).