Discuss this help topic in SecureBlackbox Forum
SSH: Enable various subsystems
By default TElSimpleSSHServer class has Shell and Command subsystems enabled and port forwarding disabled.
Shell subsystem is enabled and disabled using AllowShell property. Command subsystem is enabled and disabled using AllowCommand property.
Client port forwarding is enabled and disabled using AllowClientForwarding property. Server port forwarding is enabled and disabled using AllowServerForwarding property.