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These packets travel both from the outside network to the computers on the LAN during the downlink (such as when you’re downloading a file from the internet), and in the opposite direction during the uplink (such as when you’re uploading a video to YouTube). When you browse the internet or use a VOIP program like Skype to make a call, your computer communicates with the Wide Area Network (WAN) by exchanging packets of information over designated ports these differ according to the application type. What Is a Firewall and How Does It Work?Ī firewall regulates connections between devices on your local network, the LAN, and the outside world. A third of all Americans will be hacked every year, and the numbers are still growing.Īs cybercrime continues to skyrocket, protecting your sensitive data, like online banking details and personal information from theft should be a top priority – and using a firewall is the first line of defense. On average, hackers infiltrate unsuspecting users’ computers every 39 seconds. What Are Some Good Firewall Recommendations?.Does a Firewall Alone Offer Enough Protection?.What Kind of Attacks Do Firewalls Protect Against?.What Is a Firewall and How Does It Work?.