Lennart Koopmann, founder of Graylog and creator of Nzyme, joins Detection Dispatch to make a case for bringing network visibility back into the detection conversation. We spend a lot of time monitoring auth logging from endpoint, identities, and cloud environments. But what about everything else connected to the network? The smart TVs, printers, security cameras, Bluetooth beacons, office sensors, and even the refrigerators that can apparently be turned into ovens by attackers. Lennart explains why these overlooked devices create an attack surface that traditional logging often misses, and why network telemetry can provide a different kind of ground truth. Even when a device can't run an agent, ship logs, or tell you what it's doing, its network traffic can. We get into how to turn that visibility into practical detections, from spotting unexpected connections and suspicious traffic patterns to identifying exposed services, unusual protocols, and devices communicating where they shouldn't. In this episode we get into: Why your attack surface extends well beyond endpoints, identities, and cloud infrastructureHow forgotten IoT devices, security cameras, printers, and facility sensors can become entry points for attackersWhat the French supermarket refrigeration incident teaches us about the physical consequences of connected devicesWhy network telemetry can reveal activity from devices that can't run agents or ship logsHow Nzyme collects Wi-Fi, Bluetooth, and Ethernet data to give defenders visibility into what's happening on the network (open source link)Why encrypted traffic doesn't mean network monitoring is dead, and what TLS and SSH handshakes can still tell youHow to detect unexpected connections, beaconing, port scans, VPN activity, and suspicious data transfersWhy monitoring what your security cameras communicate with can be a surprisingly valuable detection use caseBaselining normal network behavior and alert when devices start talking somewhere they shouldn'tWhy network segmentation, access controls, patching, and basic IT hygiene still do most of the heavy liftingHow attackers can overwhelm a SIEM to blind defenders, and why network visibility offers another source of ground truthPractical ways detection engineers can start experimenting with Wi-Fi, Bluetooth, and network-based detections in their home labsOne of my favorite takeaways from this conversation: stop asking what needs to talk to your fridge. Start asking why it needs to talk to anything at all. Your next detection opportunity might not be on an endpoint. It might be sitting under a conference room table, plugged into a wall, or keeping your groceries cold. Open source IoT, Bluetooth and WiFi threat detection: https://www.nzyme.org/download Detection Dispatch (Alex's Version) is an independent detection engineering & threat hunting podcast. Rebuilt. Community-first. Featuring a lineup of the real and active projects pushing the limits of detection engineering, threat hunting, and everything in between.