For instance, say I had a Small Office Home Office (SOHO) and I have my modem connected to a switch that connects to two different routers. One router for my home network and one router for my office network. I want to prevent the workers in the office from accessing the home network.
Say there are 3 computers connected to the home network and 4 computers connected to the business network.
What would the addressing scheme look like?
Best answer:
Answer by JoelKatz
The setup you describe won't work. You can only have one device connected to your modem, two routers won't work. Also, which network is the switch supposed to be on? The way you have it setup, it's not on the home network or the office network.
The best way to do it would likely be like this:
modem <-> office_router <-> home_router
Connect office machines to the office router. Connect the home router's Internet/WAN port to one of the office router's LAN ports. Connect the modem to the office router's Internet/WAN port. Connect the switch to either router's LAN port depending on which network you want the switch to be on.
This way, the office network will provide the home router with Internet access. Office machines won't be able to access the home router just as Internet machines can't because they'll be trying to get in through the home router's Internet/WAN port (which it shouldn't allow).
Note that you will have to change the LAN address on one router or the other. The home router will get very confused if it's WAN address is inside its LAN network. You can just change the home (or office) router's LAN address from the default of 192.168.0.1/24 to 192.168.1.1/24. (And make corresponding changes in the DHCP range, if needed.)
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