I have 4 ethernet devices contained in one system. There are several systems connected on the ethernet network; I would like to use the exact same ip addresses internally with in each system. . I can expose one device to the outside world using another network interface. If they were all computers I know I can do this with a simple switch and a separate nic on one computer with routing disabled.
With this in mind : System A has 4 NIC's 192.168.100.10, 11, 12, 13 System B has 4 NIC's 192.168.100.10, 11, 12, 13
How can I isolate these "system" private networks from each other and also allow access to them from the outside world via a network connection. [Theses are not computers - they are network devices] for now just think of them as NIC cards. How do I isolate these two systems and yet provide a path via the lan or internet connection for remote access to the devices with in the systems.
Could a managed switch do this for me?
EDIT 4-12-2016 : 17:17 EDT USA
I need to be able to keep the 4 ip addresses inside the system private - and the purpose of the switch inside the system is exactly that - the 4 devices with private ips are linked together on the switch - on their on subnet. I will need to be able to access those devices from outside the system via the company LAN - because there are multiple systems with exactly the same IP's internally this means I can not expose these to the LAN. So How can I gain access to them with out exposing them to the LAN - but also do this from the LAN. If I need to add something to the system to do it - I will do that - but I am not sure. If the devices were computers I could do this - and have done this before. But they are not computers - they are dumb devices with an interface. So with 4 devices plugged to a switch they can communicate together. Now I need to be able to have access to each one from the LAN. If I set up a PC internally - I would need to load all the required software for programming each device on the thing and perform that with Teamviewer or VNC , I do not want to do that.
Could I use a managed switch and use something like IP forwarding to via that switch - giving that switch a specific IP and the devices connected to it on their own private lan?