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They Are Listening

Network-Level Blocking

How to kill tracking telemetry before it leaves your router.

Relying on software toggles on individual devices is a losing battle. The most effective way to prevent Smart TVs and IoT devices from transmitting tracking data is to block it at the network level using a DNS sinkhole.

What is a DNS Sinkhole?

Every time your Smart TV tries to send viewing data to a broker, it must look up the broker's IP address (e.g., `telemetry.samba.tv`). A DNS sinkhole, like Pi-Hole, intercepts this request on your local network. If the domain is on a blocklist, the Pi-Hole returns an invalid address, effectively null-routing the traffic. The TV simply fails to phone home, while normal functions (like streaming Netflix) remain unaffected.

The Pi-Hole Setup

  1. Acquire a Raspberry Pi (or run Docker on a local NAS/server).
  2. Install the Pi-Hole software (`curl -sSL https://install.pi-hole.net | bash`).
  3. Configure your home router to use the Pi-Hole's IP address as the primary DNS server.
  4. Add specific blocklists for Smart TV telemetry (e.g., the Perflyst SmartTV blocklist).

Hardcoded DNS Fallbacks

Some aggressive devices (like Google Nest hubs) try to bypass local DNS settings by hardcoding `8.8.8.8` (Google's DNS) into their firmware. To stop this, you must configure your router's firewall to intercept all outbound requests on port 53 and redirect them back to the Pi-Hole. This is known as "DNS hijacking."