Unidirectional Gateway solutions come in pairs: the TX appliance contains a laser, and the RX appliance contains an optical receiver. The Gateway pair can transmit information out of an operations network, but is incapable of propagating any virus, DoS attack, human error or any information at all back into the protected network.

Waterfall agent software gathers data in real time from operations servers inside the protected network. The software transmits that data to the external network, and populates replica servers with the data.