I have an old existing Wireless N 300 Mbps WR841N router configured for packet filtering restricting access to users through Access Control feature to pass all the DNS traffic only through OPENDNS...

I have setup on Network>DHCP Server>DNS Server1 & DNS Server2 my preferred DNS servers(DNSFORFAMILY). And yes with this all my devices on LAN use this DNS by default. However, my son has a laptop...

TO BLOCK INDIVIDUAL IPs (LIKE 1.1.1.1 OR 8.8.4.4) ,HERE IS THE SOLUTION https://techexpert.tips/tp-link/tp-link-archer-c20-ac750-blocking-ip-address/ FOLLOW THE STEPS GIVEN IN THE LINK AND YOUR IPs...

@Marvin_S here is the solution to block indiviual ip https://techexpert.tips/tp-link/tp-link-archer-c20-ac750-blocking-ip-address/

@DaisyChainWiFi try this https://techexpert.tips/tp-link/tp-link-archer-c20-ac750-blocking-ip-address/ it may help