No, the lan config looks clean. What DNS service is the client using? Does the browser on the client have its own dns settings? There’s no reasonable explanation why a client would be talking to the ISP DNS servers, based on the router config.
No, the lan config looks clean. What DNS service is the client using? Does the browser on the client have its own dns settings? There’s no reasonable explanation why a client would be talking to the ISP DNS servers, based on the router config.