We have multiple standalone ap's, each one is connected with a trunk port to our local network. No internet access.
We have on each ap a bridge to wan network with access vlan 1.
Now for testing something we added a cable to the second ethernet port on only one ap (lets call this one ap A and the others B) directly into the isp router.
If a device connects to an ap B, it's getting an ip from the isp router and can connect to internet.
How is this possible?