ONE-WAY NETWORK INTERFACE

摘要

Two embodiments of a one-way network interface card are disclosed, a transmit-only version and a receive-only version. A network controller mounted on the circuit card is coupled to the host computer via a host computer interface. A first processor is coupled to a network interface of the network controller. A second processor has a separate network interface for communicating with a remote computer. A one-way link is coupled between the first processor and the second processor. For the transmit-only embodiment, the one-way link only allows information to be transferred from the first processor to the second processor, and thus information may only pass from the host computer to the remote computer. For the receive-only embodiment, the one-way link only allows information to be transferred from the second processor to the first processor, and thus information may only pass from the remote computer to the host computer.

主权项

1. A transmit-only network interface card for a host computer, comprising:
a single printed circuit card configured to be mounted in the host computer; a network controller mounted on the single printed circuit card and coupled to the host computer via a host computer interface and having a network interface; a source processor mounted on the single printed circuit card, the source processor coupled to the network interface of the network controller and configured to forward information received from the network interface on a separate output; a one-way data link mounted on the single printed circuit card, the one-way data link having an input coupled to the separate output of the source processor and an output, the one-way data link configured to transfer data only from the input to the output and to prevent any signal from passing from the output to the input; and a destination processor mounted on the single printed circuit card, the destination processor having an input coupled to the output of the one-way data link and a network interface, the destination processor configured to forward information received on the input to a remote computer via the network interface.