Firewall

cybersecurity · network protection · internet safety

Your Digital Bouncer. A firewall works like a security guard at a concert, checking everyone who tries to enter or leave. It looks at data traveling across the internet and decides whether to let it through based on safety rules you set.

Catches Bad Traffic. Firewalls monitor incoming and outgoing traffic, which is like watching both doors of a building. They stop harmful data from hackers from sneaking in, while also blocking your computer from accidentally connecting to dangerous sites.

Two Main Types. Network firewalls protect an entire building's computers from the internet, while host firewalls live on your personal device and protect just that computer. Most people use both kinds together for extra safety.

Follows Your Rules. You can teach a firewall which programs are allowed to connect to the internet and which aren't. It's like giving it a list of trusted friends who can visit while blocking strangers.

Keeps Secrets Safe. Firewalls create a protective barrier between your computer and the wild internet. This helps protect your passwords, photos, and personal information from people who want to steal it.