Directly connect to Raspberry Pi behind firewall from anywhere as if it was on the local network. Send command and batch job to raspberry pi from web portal. No need to discover the IoT device IP and change any firewall settings. Support all Linux machines and TCP services such as SSH, VNC, RDP and HTTP.
All data is wrapped with encrypted SSH tunnel. SSH your IoT device with the system user or SSH key based secure authentication and these standard client tools such as Putty. No security holes in other private client tools and protocols.