What a smart firewall does and why it matters on home Wi-Fi

Most of us think of home Wi-Fi as the invisible connection that lets a laptop stream a movie, a phone display photos and a printer work from across the room.

In practice, it is also the meeting point for many devices, accounts and types of information.

A typical home network may include computers, phones, tablets, smart speakers, televisions, cameras, printers and connected appliances.

These devices regularly send and receive data.

Some of that traffic is expected, such as opening a bank website or downloading a software update.

Other traffic may be unwanted or suspicious.

That is where a firewall comes in.

A firewall is a security system that checks network connections and applies rules about which traffic should be allowed.

Think of it as a doorman for digital connections.

It does not know everything about every visitor, but it can help prevent some unexpected traffic from reaching a device.

Understanding how firewalls work, where they fit and what they can and cannot protect against can help you make smarter choices about securing your home Wi-Fi.

Missed CyberGuy LIVE? Watch the Protect Your Money replay Our free CyberGuy LIVE class, Protect Your Money From Today’s Biggest Threats , has ended, but you can still watch the full replay and download our financial protection checklist.

Kurt "CyberGuy" Knutsson walks you through five simple ways to help defend yourself against AI scams, fraud, identity theft and financial hacks.

You’ll learn how to set up bank alerts, strengthen your account logins, protect your phone number, freeze your credit and help secure your retirement savings against unauthorized transfers.