Protecting IoT and Smart Home Devices with DNS
By [FILL IN], [FILL IN] · Last updated
Cameras, plugs and speakers rarely get security updates. Use DNS filtering to limit what IoT devices can reach and spot compromised ones.
The IoT problem
Smart devices often run outdated software, use default passwords and cannot run security apps. Botnets such as Mirai have recruited millions of them.
How DNS helps
Every IoT device uses DNS to reach its cloud. A DNS firewall blocks malicious destinations and reveals unexpected traffic.
- Block botnet and malware domains
- Block DNS rebinding to protect the local network
- Watch the log for devices contacting unknown domains
- Block vendor telemetry you do not want
Extra steps
Put IoT devices on a separate guest network, change default passwords and replace devices that no longer receive updates.