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IoT Security Basics: Device, Network and OT Zones
IoTMarketi Editorial
Industrial IoT guides
At a glance
IoT breaches often start with default passwords, cleartext protocols and flat networks. A practical checklist inspired by IEC 62443 zoning.
Why IoT security is different
Devices live for years, patching is hard, and OT cannot tolerate downtime. “Expose to cloud and forget” fails in industry.
Practical checklist
- Change default credentials
- Put admin UIs behind VLAN/VPN
- Use TLS and topic ACLs on MQTT
- Protect LoRaWAN keys
- Plan firmware update channels
- Define OT/IT security zones
Hardware role
Industrial routers provide firewall, VPN and cellular failover — part of the security design.
Takeaway
Security is the first line of the architecture, not a post-go-live ticket.
Frequently Asked Questions
IoT cihazları doğrudan internete açılmalı mı?
Mümkünse hayır. Yönetim için VPN, reverse tunnel veya broker üzerinden kısıtlı erişim tercih edin.
