Build an IoT Security Lab with a Raspberry Pi
IoT devices run real Linux on cheap ARM chips, ship with old firmware and are rarely monitored. A Raspberry Pi is the cheapest way to learn how they work — and how they get owned. This is the lab behind my IoT Shield project.
What you need
Keep it isolated from your home network.
- Raspberry Pi (any recent model) + SD card
- A separate switch or VLAN for the lab
- A Kali machine (or Kali NetHunter on a phone) for attacks
- An Ubuntu VM for MISP and analysis tools
Learn the hardware
Map CPU, memory, storage, GPIO and the boot process. Knowing how the device boots tells you where firmware lives and where an attacker would persist.
Pull apart the firmware
Extract the image and run Binwalk to find file systems, keys and scripts. Radare2 helps when you need to read a binary. Then modify something small and see how the device reacts.
Detect attacks on it
Install an EDR agent (I used OpenEDR), point Suricata at the lab traffic and simulate attacks — reverse shells, botnet-style scanning, C2 beacons. Write YARA rules for what you find and push IOCs into MISP automatically.
Harden and compare
Change default credentials, update firmware, remove unused services and segment the network. Rerun the same attacks and measure what changed.
Tools mentioned
A ₹5,000 board teaches firmware, detection and hardening better than any slide deck — just keep it off your real network.