Securing IoT Devices with DNS Filtering
Cameras, printers and smart devices rarely have security software. Network-level DNS protection helps.
Modern offices contain many connected devices beyond computers: CCTV cameras, video recorders, printers, smart TVs, access control systems, sensors and building management controllers. These IoT devices are often the weakest link in network security.
Why IoT devices are risky
They frequently run outdated software, use default passwords and cannot run antivirus tools. Manufacturers may stop releasing updates after a few years.
How attackers use them
Compromised devices can join botnets used in DDoS attacks, act as footholds to reach other systems or leak sensitive video and data.
How DNS filtering helps
DNS filtering applies at the network level, so it protects devices that cannot run security software. It blocks communication with malware infrastructure and known malicious domains.
Restrict what IoT can reach
For stronger control, apply strict policies to IoT networks that allow only the domains devices genuinely need, such as the manufacturer's update and cloud services.
Combine with segmentation
Place IoT devices on separate VLANs so a compromised camera cannot reach finance systems.
Change default credentials
Replace default passwords and disable unused services on every device.
Keep firmware updated
Apply manufacturer updates when available and plan replacement for unsupported devices.
Monitor DNS activity
Unusual lookups from IoT devices are a strong sign of compromise because their normal behaviour is predictable.
Inventory devices
Maintain a list of connected devices, their locations and owners.
The bottom line
IoT devices need protection too. DNS filtering, segmentation and good hygiene keep them from becoming entry points into your network.
Learn more about Cloud DNS & Web Filtering from UbiFi, or talk to our team.
Protective DNS that blocks phishing, malware and unwanted content for every device on your network — no software to install.
