I've been thinking about how I could construct my own data diode. I know there is a lot to consider, but right now I am just curious about the physical layer.
Does anyone know if it would be possible to splice into some cat-5 cable a few actual diodes and still have the signal pass? Or would they mess up the impedance, or something like that. I know there are transmit and receive pairs, but perhaps they could be remapped somehow. I would be cool if you could actually just buy some diodes and make your own one way cable.
That's a very interesting idea! But I also wonder whether the signal wouldn't be too corrupted maybe. I guess ethernet compensates for that, but will it be enough? Also, isn't there other (management) traffic on those cables, other than actual TCP/IP communication?