D3-DNL Directional Network Link

Enforce one-way network communication by preventing two-way communication.

How it works Using a device such as a data diode, or otherwise enforcing unidirectional (one-way) network communication / data transfer, to physically prevent signals from traveling in the reverse direction. Unidirectional network link enforcement is a security measure used to separate control and safety systems in operational technology (OT) environments. By employing physical data diodes, this approach ensures one-way communication, allowing information from safety systems to be viewed without permitting any modification or interference, thereby protecting the integrity of the safety system.