I'm curious what function a data diode (unidirectional network) would provide besides sensor data/mirroring/replication. Once you do anything that requires packet confirmation (TCP) you open yourself to OSI layer 4 security risks. Seems like mirroring/replication would need some feedback and then is it just sneakernet restore? Or another diode out from the replication for specific processing? If the same control system has access to both diodes then it's not a unidirectional system anymore. Is a data diode more of a pseudo-unidirection where it is enforced above TCP?
I completely agree that IT admin could be a lot more secure by design. Combined with better interfaces for responsible configuration.
I completely agree that IT admin could be a lot more secure by design. Combined with better interfaces for responsible configuration.