I’ve noticed a new phenomenon in recent times where a user of a certain product, be it a nas, a switch, a ip camera, wireless ap, or anything else really, posts up questioning why X device is making X number of repeated DNS requests. Just shut the hell up, seriously. This is normal behavior, it’s how DNS works. The device makes a request and the caching DNS server replies with the answer. This is how DNS has always worked, but these dim bulbs have been given a light in the window to the inner workings of DNS and have suddenly crapped their diapers about it. Also, the thought of offloading a critical network service like DNS to a $30 device is horrifying to me. But then again, like I said, Pi-hole users are the worst.