[OpenWrt Wiki] Parental controls
openwrt.org › docs › guide-userDec 05, 2021 · Follow: Filtering traffic with IP sets by DNS Since OpenWrt in a typical setup with a LAN and WAN zone does the name resolution and the firewall at the same time, all information is there to match domain names, their current IPs as they are handed out to the LAN-hosts and act accordingly in the firewall.
[OpenWrt Wiki] Device Support: MAC address setup
openwrt.org › docs › guide-developerAttention: Not all interface can be referenced this way. To check whether there actually is a usable MAC address, check the device tree on your router: Run find /proc/device-tree/ -name "*mac-address" on your device. Attention: This will only work if you have already set up MAC addresses correctly based on the information retrieved above.