Part of the Triarch system. A PC running QNX and two TCP/IP stacks, which provides network address translation from a client network to the vendor network, as well as DNS service for the client-side NATed IP's of servers on the vendor network.

One reason for this is that the Triarch system is usually placed on totally private networks, which set up IP subnets without regard to Internet allocation. Therefore no one subnet could be used and be guaranteed to work on all customer sites, so a NATing box is provided. In order to easily access vendor services, the box provides DNS based on the NATed addresses.

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