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How to have two separate network segments?

How to have two separate network segments?

How to have two separate network segments?

(OP)
Can anyone tell me how to separate PC's on a network using two routers?  I want them to have Internet access, but not be able to access each other at all.

I have one static ip assigned by isp. (maybe that's the answer: get a second static ip; didn't want that expense though) I have 1st router connected to cable modem via its wan port.  Then a switch connected to this 1st router via one of its lan ports.  I have a 2nd router connected to switch. All PC's have internet access.  That's not a problem.  

The PC's configured with 1st router's gateway can't "see" the PC's configured with 2nd router's gateway, but the PC's on the 2nd router's gateway can see the PC's on the 1st.

Any suggestions please?

RE: How to have two separate network segments?

Not sure exactly how you'd do it but couldn't you just put the router in a subnet that both PCs can see but put the PCs in a different subnet to one another?

I'm not very good at calculating subnets but I think that works in theory?

Jonathan

Jonathan Haddock
Network Manager
Barton Court Grammar School

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