ISP WiFi Router where OpenWrt cannot be installed.
DLink Router where OpenWrt is installed.
Problem
I need to filter traffic sent to Device 1, but I can't install OpenWrt on it and I can't instruct clients to use Device 2 directly instead either. I also need to let client connect to the WiFi from Device 1, so I don't believe I can simply turn on bridge mode on the same device. What should I do to achieve this configuration?