Hey there!
I have created a guest network using this guide: https://openwrt.org/docs/guide-user/network/wifi/guestwifi/guest-wlan
I have connected all of my chromecast devices (an android tv and couple of nest audio devices) to the guest network for security reasons. I basically don't want google to be able to discover the devices in my main ("lan") network.
When I connect to the guest networks, I see all the chromecase devices.
When I am connected to the main network, I don't see any.
What firewall zone or rule do I have to create to make devices in "lan" discover the chrome cast devices in "guest"?
Tried a bunch of things but couldnt get it to work