isolated

Hello, everyone. Please excuse me if it's not the right category, it's my first post. I'm having an issue with my RT-AC88U on 386.7_2. After setting everything to my liking (including smart connect rules, etc.) I now have the following issue: Wireless clients can't communicate with one another...

I want to prevent Router 2 from pinging all my devices. I want only internet access there. (Router 1 My network) (Router 2 Isolated/Guest Network) I tried to apply some Firewall Rules like mentioned here in Post #7: Click here but if I apply them on the Main Router (Router 1) my Internet...