The Fox DataDiode Hardware is the device that guarantees one-wayness of a network connection. With it, you can assure that secrets remain secret, and critical systems are not manipulated. The Fox DataDiode is the only one-way solution worldwide that has seen overwhelming independent confirmation of its security claims, and has a Common Criteria Evaluation higher than EAL4+: EAL7+.
Moreover, the Fox DataDiode is the only one-way solution that guarantees one-wayness on a physical level: it does not have software, firmware or FPGAs. Hence, it cannot be exploited or wrongly configured.
Download the Fox DataDiode Technical Data Sheet here.