The 5-Step approach to Cross-Domain OPC data transfer with Cogent DataHub and TrustedFilter™ Integration.
1. Connection to source system
Cogent DataHub is installed on the send-side of the TrustedFilter™ Appliance (or flanking system), and acts as an OPC Client, subscribing to OPS Servers on the source network to receive OPC Data.
2. DHTP tunnel over TCP to unidirectional flow control
Cogent DataHub sends the OPC data in a DHTP tunnel over a TCP stream to the unidirectional flow control device within the TrustedFilter™ appliance.
3. Hardware Enforced Protocol Break & Air Gap
The TrustedFilter™ unidirectional flow control device terminates TCP/IP and transforms data into non-routable cells of data in FPGA. The core data payload is transported via unidirectional optical fibre. The data payload is reassembled in FPGA into a TCP stream and sent to an instance of Cogent DataHub on the receive side.
4. Receive DHTP from unidirectional flow control
A second instance of Cogent DataHub is installed on the receive side of the TrustedFilter™ appliance (or flanking server), receiving OPC data through the DHTP tunnel.
5. Connection to destination system
At the receiving end, Cogent DataHub operates as an OPC Server. The OPC client on the destination network establishes a connection with this server to retrieve OPC data, which is subsequently delivered to its intended destination.
Enabling Components
Cogent DataHub
Cogent DataHub software instances establish connections between OPC Servers and Clients on the source and destination networks to efficiently transport data to and from the unidirectional appliance.
Data Diodes
Unidirectional flow control components (Data Diodes) are installed within the TrustedFilter™ Appliance to enforce the one-way flow of traffic and perform a protocol break.
The all-encompassing TrustedFilter™ Appliance
4Secure adopted their TrustedFilter™ Appliance to implement this solution. The all-encompassing extensible appliance consists of a unidirectional gateway, the full TrustedFilter™ software suite and boasts considerable computational power to effectively host the Cogent DataHub software. Bi-directional model is also available.
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