GoKawiilBlogger Reverse-Engineers Lidl Smart Kettle's WiFi Network Protocol
A hobbyist blogger purchased a WiFi-enabled Lidl Smart Kettle and began probing its network behavior after setting it up through the companion Lidl Smart Home App. Using nmap and netcat, they found the kettle opens a single TCP port (6668) that responds to connections but returns no identifiable banner or HTTP response, leaving its underlying protocol a mystery for further investigation.
GoKawiil's interpretation of the reporting above, not reported fact.
This kind of grassroots IoT security research highlights how consumer smart devices often ship with poorly documented, proprietary network protocols that make independent security auditing difficult. As inexpensive smart appliances proliferate in homes, understanding their communication methods is essential for spotting vulnerabilities before they're exploited at scale.
- The Lidl Smart Kettle creates its own access point for initial WiFi setup via a companion app.
- Only one TCP port (6668) is open on the device, using an unidentified custom protocol.
- The blogger's investigation is ongoing, with no clear answer yet on what service runs on that port.
Cosori Smart WiFi Electric Kettle — If this hacker's tale of reverse-engineering a WiFi kettle gave you the itch, a smart electric kettle like Cosori's app-controlled model lets you set precise temperatures for tea or pour-over coffee from your phone. It's the perfect starting point for your own "I'm a teapot" home-automation experiment "and it boils water nicely too.
See Cosori Smart WiFi Electric Kettle on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: blog.boerzel.de — Benjamin Börzel, 2026-09-10
Published there as: “Operation Smart Kettle – Börzels Blog”
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