IoT devices are expanding attack surfaces. From smart cameras to industrial sensors, improper security can lead to botnet recruitment, data theft, and network compromise.
IoT Security Challenges
- Limited computing resources for security
- Default/weak credentials
- No automatic updates
- Long device lifespans without patches
- Lack of encryption
Security Best Practices
Network Segmentation
Isolate IoT devices on separate VLANs with firewall rules limiting access to critical systems.
Device Hardening
- Change default passwords immediately
- Disable unnecessary services (Telnet, UPnP)
- Enable encryption where available
- Update firmware regularly
Monitoring
- Monitor for unusual traffic patterns
- Use network-based IDS for IoT segments
- Check for known IoT malware signatures
Notable IoT Attacks
| Mirai Botnet | Used default credentials to build massive DDoS botnet |
| Stuxnet | Targeted industrial control systems |
| Ring Camera Hacks | Credential stuffing on home devices |
Quick Wins
- Create dedicated IoT WiFi network
- Block IoT from accessing Internet directly
- Disable cloud features if not needed
- Inventory all connected devices
December 2024