Key Takeaways
Summary
18 items · 30–60 minutes
Why Network Security Comes Before the First Smart Device
Adding a smart bulb, thermostat, or doorbell camera to your home sounds straightforward — plug it in, follow the app, done. But each device you connect is also a node on your home network, and a poorly secured network turns convenience into vulnerability. Unlike a laptop or phone, most smart devices (often called IoT devices) receive infrequent updates, run minimal software stacks, and can't be protected by antivirus tools. If one device is compromised, an attacker may be able to reach others on the same network — including computers holding sensitive personal data.
The good news: the fundamentals that protect your network aren't complicated. Most of the steps below can be completed through your router's admin panel in under an hour. Think of this checklist as an audit you run once, then revisit whenever you add new equipment or change internet providers. Before diving into which ecosystem suits your needs — see our smart home ecosystems comparison — it's worth confirming that the network those devices will live on is properly locked down.
Default Credentials Are Publicly Known
Router manufacturers ship devices with default admin usernames and passwords — and these are publicly listed in online databases. An attacker on your network, or in some cases reachable via the internet if remote management is enabled, can use these defaults to take full control of your router. Changing the admin password is the single highest-priority action on this entire checklist and should be done before the router is ever connected to your devices.
Tools You'll Need for This Audit
You don't need specialised software to work through this checklist. The items below are the standard access points for checking and changing your home network's configuration.
Router admin panel
The primary interface for changing encryption settings, passwords, firmware, and network segmentation options on your router.
Password manager
Used to generate and securely store strong, unique credentials for your router admin, Wi-Fi network, and smart home accounts.
Manufacturer's mobile app
Required for checking and applying firmware updates to individual smart devices before and after connecting them.
Network scanner app (e.g., a LAN scanner)
Helps you audit which devices are currently connected to your network so you can identify anything unfamiliar.
The Security Checklist
Work through these groups in order — router-level settings first, then network structure, then device-level habits. Each item notes whether it's a firm requirement or a strong recommendation.
Router Credentials & Admin Access
Encryption & Protocol Settings
Firmware & Software Updates
Network Segmentation
Unnecessary Features & Attack Surface
Device-Level Habits
Some Smart Devices Still Use Outdated Protocols
Certain older or budget smart home devices only support 2.4 GHz Wi-Fi and may have compatibility issues with WPA3 or newer security settings. If a device fails to connect after you've updated your security configuration, check whether the device requires WPA2 mode before assuming your settings are wrong. This is worth researching before purchasing a device, not after.
Once your core settings are secured, consider whether your setup can grow safely over time. Our guide on planning a connected home setup covers how to structure a system that stays manageable as you add more devices.
After the Checklist: Ongoing Habits
Running through this list once is a solid start, but home network security is an ongoing practice rather than a one-time task. Router firmware releases, new CVE disclosures for popular device models, and changes in your own device inventory all create reasons to revisit your settings periodically — every few months is a reasonable cadence for most households.
If smart devices keep dropping off your network after you've tightened security settings, that's usually a separate issue related to signal strength or frequency band conflicts — not a security problem. Our article on why smart devices drop off the network covers those causes independently.
For households that want a more structured approach, isolating IoT devices onto a dedicated network segment is one of the most effective steps you can take. Our guide on setting up a separate IoT network explains the concept and what's involved in practice.