Force all DNS queries through PiHoleįortunately, with a few simple firewall rules, you can intercept these hardcoded DNS queries and redirect them to your PiHole. On average, Smart TVs generate an average of 60 megabytes of outgoing Internet traffic per day, all the while bypassing tools like PiHole. Nearly 70% of smart TVs and 46% of game consoles were found to contain hardcoded DNS settings - allowing them to simply ignore your local network’s DNS server entirely. Smart devices manufacturers often “hard-code” in a public DNS server, like Google’s 8.8.8.8, and their devices ignore whatever DNS server is assigned by your router - such as your PiHole. If you’re using PiHole on your network to block ads and prevent your various smart devices from sending tracking information to their manufacturers, you might be surprised to find out that some of these devices are using a sneaky tactic to bypass your PiHole entirely. Finally, you can subscribe to the RSS feed or follow on Twitter for updates.The HN comment thread is full of insightful comments from individuals who work on IoT hardware and other embedded devices, and is well worth a read.made some great additional suggestions in this Twitter thread which I incoporated in the DNS over TLS/HTTPS section.
Hammad Mazhar for his research that inspired this guide.
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