System components
A DD Engine system setup consists of the following components:
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Upstream DD Engine - A proxy server running DD Engine firmware. It manages data transfer and protocol services on the source network. It also hosts the Upstream DD Manager.
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Upstream DD Manager - A web-based administration tool, allowing an administrator to manage the Upstream DD Engine.
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Downstream DD Engine - A proxy server running DD Engine firmware. It manages data transfer and protocol services on the destination network. It also hosts the Downstream DD Manager.
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Downstream DD Manager - A web-based administration tool, allowing an administrator to manage the Downstream DD Engine.
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Services - Enables protocol specific communication between networks over the Data Diode. A DD Engine can host several services. See Services for further information about available protocols.
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Data Diode - The physical device that is connected between the Upstream and Downstream DD Engines.
Information flow
When a message is sent from one network to another where both networks are connected to a DD Engine, the Upstream DD Engine validates the format of the data. If the format is approved, the data is transferred over the Data Diode to the Downstream DD Engine where the message is reconstructed and sent to the intended receiver on the other network.