I have 3 pc connected to a switch that is connected to a bigger network. I want those pc to live in their network and don't expose their ips. (in this very moment the scope is accomplished using a pc with 2 network ports and a nat utility which is not very effective 2pc====switch---pc---extNetwork)
I thought I should use a "router" that could handle calls in spite of them, is it correct? In this way, calls from outside have to be made to that router and handled to the single pcs on a PAT/NAT rules basis. could this work?
If yes, what is the correct type of hardware that I should use? I would need a small (4-8ports), maybe industrial-ish and cost-effective device. should that be a managed switch or a proper router? I can find a lot of managed/un-managed switches of any level of roughness but no routers over there.