How to only access controllers thru one pc.

I have a situation where I have some IP based hardware that controls a electric motor board.   I do not want my network clients to be able to see or access those IP address of those devices.  But I would like only 1 PC on my network to access them.    How can I restrict access to them by the only one PC?
Kevin CaldwellOwner of RUseeingRed Tech SolutionsAsked:
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rindiConnect With a Mentor Commented:
Use another subnet for that motor board, and either add a 2nd NIC to your PC for that subnet and connect it directly to the PC, or configure a 2nd IP for the NIC you are on that is a member of that new subnet.
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Kevin CaldwellOwner of RUseeingRed Tech SolutionsAuthor Commented:
Wow.  Yes, adding the 2nd IP to the PC that is the same as the other devices would work.
By doing that, PC's that are on the main network, would not even be able to ping the motor boards, correct?
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rindiCommented:
If the users know the ip, and they have admin rights (which should be the case), they could setup their NIC for that a 2nd IP in that other subnet, and then they would be able to Ping. For that reason a 2nd NIC would be more secure.
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Kevin CaldwellOwner of RUseeingRed Tech SolutionsAuthor Commented:
But those IP's would never be pubished to the users.   Even if they did an IP scan, you would have to know the subnet to see what they are.
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rindiCommented:
Of course not. But if the users were knowledgeable enough, and had the necessary rights and access to systems, they could access the device.
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