Securing Your Wi-Fi So Your Smart Devices Stay Yours

A smart lock is a lock and a small computer. So is a video doorbell, a camera, a thermostat, a garage door controller and the plug that runs your porch light. Each one talks to your home network, and most of them reach the internet through it. If someone else gets onto that network, or into the app account that controls those devices, the hardware on your doors matters a lot less.

The good news is that most of the protection comes from a handful of settings you change once and a couple of habits you keep. You do not need a technical background. You need about an hour, the login for your router, and a place to store passwords.

Think of the router as another front door

Your router sits between every device in the house and the rest of the internet. It decides who gets on the network and, to a degree, what those devices can reach. That makes it the natural place to start.

Find out what you have. If your internet provider supplied the router, their app or website usually shows how to sign in to it. If you bought your own, the model name and a default login are often printed on a label underneath. Write down where the admin settings live, because you will come back to them.

While you are at it, think about who already knows your Wi-Fi password. Friends, sitters, former roommates and repair techs who joined your network may still have it saved on their phones. Changing the passphrase now and then, and after someone moves out, keeps that list short. Every device will need to reconnect afterward, so plan a few minutes for it.

If the router is several years old and the maker no longer releases updates for it, plan to replace it. A router that no longer gets security fixes is a weak spot that no setting can fully cover.

Change what came in the box

Routers and smart devices ship with settings chosen for easy setup, not for security. A few of those deserve attention right away.

The admin password

This is the password that lets someone change the router's settings, and it is different from the Wi-Fi password. Many routers ship with a default that is printed on the device or shared across a whole product line. Change it to something long and unique.

The Wi-Fi password and encryption

Use the strongest encryption your router offers, usually labeled WPA3, or WPA2 with AES if WPA3 is not available. Avoid older options like WEP or an open network. Set a long passphrase (a string of several unrelated words works well) and do not reuse it anywhere else.

Features you probably do not need

Look for these and turn them off unless you have a specific reason to keep them:

• WPS, the push-button or PIN pairing feature, which has a history of weaknesses
• Remote management, which lets the router's settings be changed from outside your home
• UPnP, which lets devices open connections on their own; some gaming or streaming setups rely on it, so test things after turning it off

Also change the network name if it includes your family name, street address or router model. A plain name gives strangers less to work with.

Give smart devices their own space

Many routers can run a second network, often called a guest network. Putting cameras, plugs, speakers and other smart devices there, separate from the laptops and phones you use for banking and work, means a weakness in one inexpensive gadget is less likely to reach your personal files.

Some newer routers offer a dedicated setting for smart home devices, which does the same job with less effort. Check whether devices on the guest network are isolated from the main network. If a device needs to talk to your phone during setup, you may need to join the phone to that network temporarily and then switch it back.

Updates are the unglamorous part

Most security fixes arrive as updates, and they only help once they are installed. Set everything you can to update automatically:

• The router's firmware
• Each smart device's firmware, usually managed in its app
• The apps on your phone that control those devices
• The phone's own operating system

When you shop for new devices, look at how long the maker says it will support them with updates. A product with a clear support period is easier to trust than one with no stated plan. Devices that have stopped receiving updates are good candidates for retirement, especially cameras and locks. A short list of your connected devices, with roughly when you bought each one, makes it easier to spot the ones that have aged out.

Lock down the accounts, not just the network

Many smart devices are controlled through a cloud account. If someone learns that password, they may not need your Wi-Fi at all. Treat those accounts as seriously as your email.

• Give each account its own unique password, kept in a password manager.
• Turn on two-step verification, preferably with an authenticator app rather than text messages where that option exists.
• Review who has shared access. Former roommates, house sitters and contractors should be removed when they no longer need it.
• Use the app's activity or login history, if it has one, to spot sign-ins you do not recognize.
• When you sell or give away a device, factory reset it and remove it from your account first.

Be wary of messages that ask you to confirm a password or a verification code, even when they look like they come from a device maker. Go to the app directly instead of tapping a link.

A router checkup you can do this weekend

Set aside an hour and work through these questions:

• Can you sign in to your router's admin page, and is the admin password changed from the default?
• Is the Wi-Fi using WPA3, or WPA2 with AES, with a long passphrase?
• Are WPS and remote management turned off?
• Is automatic firmware updating turned on?
• Are smart devices on a guest or separate network?
• Does every device app have a unique password and two-step verification?
• Is there anyone with shared access who should not have it anymore?
• Do you recognize every device listed as connected to your network?

That last question takes a few minutes the first time. Rename devices in the router's list as you identify them, so an unfamiliar entry stands out later.

Keeping it simple over time

Network security is less about one big setup and more about small check-ins, perhaps each time you add a device or change your internet service. If you want more plain-English help with the physical side of home security, from locks to lighting, SecureYrHome's homeowner guides cover those topics in the same practical style.