@heikogr Maybe you can provide a screenshot of the configuration so we can check if there's anything unusual.

May I ask what the current software and hardware versions of your ER605 are?May I ask what the current software and hardware versions of your ER605 are?

@KajtekKajtek After re-enabling it, wait a few minutes and then try pinging the WAN again to see if it still responds.

@O2o In the DHCP protocol, option 6 is used to specify DNS servers. Our LAN network’s DNS setting corresponds to option 6, so you can simply enter your Pi-hole’s IP address in the LAN Network DNS...

@SteveM001 Please first upgrade your router’s firmware to the latest version, V2_2.3.3 Build 20251029, and then check whether the feature works properly.

@NewbAdmin Thank you for taking the time to share your insights within the TP-Link Community. Your feedback is greatly appreciated and has been formally documented and escalated to our Product...