This $20 piece of e-waste does what a $300 Pi can’t: Whole-network ad blocking and DNS filtering

Businesses often sell thin clients by the pallet (literally) whenever their leases end or the devices reach end-of-life, and as a result, you can regularly find them on eBay or Facebook marketplace for $15 to $25. With a few open-source projects, you can repurpose one of these tiny, low-power devices to replace Google’s DNS server and improve your network’s security and privacy simultaneously