Answer and scope

Yes—using a VPN can be part of protecting IoT devices, mainly by securing network traffic when it travels over less-trusted connections (for example, public Wi‑Fi or the open internet). However, a VPN does not automatically secure the device itself, the router settings, or the account/passwords used by the IoT ecosystem.

Think of a VPN as a “protected tunnel” between the IoT environment and a network endpoint you trust. If the IoT device is already compromised, misconfigured, or running outdated firmware, a VPN may still leave the device unsafe. The protection you get depends on how you set up remote access and how you reduce what the IoT devices can reach.

How a VPN helps IoT protection

A VPN creates an encrypted connection between two points (for example, your home router and your phone, or a remote client and a home network). For IoT use, that matters because many risks happen when traffic crosses untrusted networks or when devices are exposed directly to the internet.

Common ways a VPN can help:

  • Encrypting data in transit so local interception of network traffic is harder.
  • Avoiding direct inbound exposure of IoT devices by routing access through the VPN instead of opening ports to the internet.
  • Centralizing control: you can apply firewall rules so only VPN clients can reach the IoT network.

A key point: a VPN usually protects the communication path you tunnel, not the IoT application’s internal security or its trust decisions.

Differences and limitations that change the answer

A VPN is not the same as “IoT security.” Several limitations matter:

If an IoT device uses weak credentials, has a vulnerable service, or lacks security updates, a VPN will not reliably prevent exploitation. The attacker might not need to intercept traffic if they can authenticate or abuse an exposed service.

2) The VPN only covers what you route through it

If you access the IoT device directly from the open internet (for example, by port forwarding or exposing a web interface), a VPN may be irrelevant to that access path. Protection improves when remote traffic goes through the VPN tunnel and reaches devices only from allowed VPN clients.

3) DNS and app behavior can complicate “it’s all encrypted” assumptions

Even with a VPN tunnel, an IoT app and its services may involve additional network steps (name resolution, cloud connections, redirects, third-party endpoints). A VPN can still help, but you should not assume every related request is equally covered in every scenario.

4) Performance and reliability can affect monitoring and control

Some VPN setups add overhead and can introduce latency. With IoT devices used for automation or real-time control, reliability matters—so a VPN configuration should be tested for stability, not assumed.

Practical checks before relying on a VPN

Use a checklist approach to verify that your VPN actually improves your IoT situation:

  • Confirm your remote access uses the VPN path, not direct internet exposure to IoT devices.
  • Review router/firewall rules so only VPN clients can reach IoT device IP addresses and ports.
  • Audit which IoT services are reachable from your network and from outside (avoid unnecessary admin interfaces).
  • Validate that IoT devices are updated and use strong, unique credentials for accounts and admin access.
  • Check connectivity and behavior: test the specific IoT actions you need while connected through the VPN.

If you find that devices are still reachable from the broader network or from the internet without going through the VPN, then the benefit is likely limited.

A VPN is most effective when paired with broader network and identity practices. Two related ideas are especially relevant:

  • Segmentation and access control (network boundaries): Restrict which devices can talk to which services, so compromise or mistakes don’t spread broadly.
  • Authentication and account hygiene: Strong credentials and fewer exposed admin interfaces reduce the chance that encryption alone becomes a false sense of safety.

When you combine VPN routing with tight access control and device hardening, you get layered risk reduction. When you rely on a VPN alone, you may still be exposed to device-level vulnerabilities and misconfigurations.