A firewall is a security system (software, hardware, or both) that monitors and controls incoming and outgoing network traffic based on defined security rules. Think of it as a digital gatekeeper.
Why it matters:
- Helps block unauthorized access to your network or computer.
- Prevents many types of cyberattacks before they even reach your system.
- Often the first line of defense in both home and business networks.
Types of firewalls:
- Hardware firewall – A physical device that protects entire networks.
- Software firewall – Runs on a computer or server to protect that single device.
- Next-generation firewall – Includes advanced features like intrusion prevention and application control.
Pro tip: Firewalls aren’t “set and forget.” They need updates and monitoring to keep up with new threats.
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