Orbi RBR50 - adding an additional router with a different IP address

[Tony-Orbi]

I am in the process of adding a small router to run my IoT devices separate from the Orbi wi-fi for security purposes. I have the following configuration. My Ip addresses are 192.168.1.x for the Orbi, and 192.168.4.X for the new router FIOS Quantum Gateway. - | | ORBI. RBR50 (192.168.1.1) --> Satellite | | (ethernet) | | New Router | 192.168.4.1 | wi-fi only Netgear Switch | | | | | | | Computers are hardwired and also WI-Fi. I do not want the 4.x units to be able to see any of the 1.x. but to have access to the internet. So far I can reach the internet form the 4.x and also access any of the units on the 1.x which is not what I need. Please advise. Tony

[Tony-Orbi]

Adding a diagram for clarity,

[FURRYe38]

Why not put the 4.x router behind the FIOS gateway instead of the orbi router. Why do you not want the 4.x devices to see the 1.x devices? 

[Tony-Orbi]

Hi FURRYe38,  my small router has only a single ethernet port so I would not be able to put the Orbi behind it, I would have to connect it directly to the FIOS Gateway.  This is not secure.  As for why I do not want the 4.x to see the 1.x it is becasu they are going to be IoT devices and they are not secure.  If I get hacked on the 4.x all they will see will be the IoT and not my computers.

Tony.