No internet on Wi-Fi when using custom DNS servers setting

[Echo]

I set up my new AX1800 behind a Verizon Gateway (G1100, I think, the older one). So Internet -> Verizon Router -> AX1800. I have wired and wireless internet (on the AX1800) working fine until I go to AX1800’s internet settings and check the “use custom DNS servers” box. Then no device gets internet on any AX1800 Wi-Fi network (wired internet still works). This is regardless of whether I check the DoH box, or which DNS provider I pick from the dropdown box. Please advise on why this is happening and how to resolve this so I can enable DoH.

[support]

The router does not treat wireless and wired connections differently when routing. So if you have Internet via Ethernet, you should have Internet via WiFi. Can you switch one of your wired device to WiFi and see if Internet cuts off? Also, run “nslookup www.google.com” from a command line to see if it’s a DNS problem.

[Author]

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