What to search for? Need some routing

My idea:
Laptop with one NIC connected to RB750, one port of RB750 connected to backbone network, second port connected to my local network (ie 192.168.1.0/24) with “my” devices (some of them broadcast and shuld not be connected to backbone), third port is the same as second port but diffrent network (ie 192.168.8.0/24) for NMS for “my” devices.
Laptop should see all three networks, but networks should not see each other.

What do I have to “Search” for help?


Best regard,
Peter

You bought a router, so by default and out of the box it will route between all directly connected networks. That is its entire purpose. You’re looking for firewall filters to specifically drop traffic between directly connected networks. There is a wiki manual dedicated to firewall filters, the wiki manual is linked in the forum header.