What is a firewall? - Cisco
A firewall is a network security device that monitors traffic to or from your network. It allows or blocks traffic based on a defined set of security rules.
What Is a Firewall? Definition and Types of Firewall | Fortinet
Firewall Definition: What Is A Network Firewall? A firewall is a network security device designed to monitor, filter, and control incoming and outgoing network traffic based on predetermined …
What is a Firewall? How Firewalls Work & Types of Firewalls
Firewall – meaning and definition A firewall is a computer network security system that restricts internet traffic in to, out of, or within a private network.
Firewall (computing) - Wikipedia
Firewall (computing) In computing, a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on configurable security rules. [1][2] A …
What Is a Firewall? (Definition, Types, Examples) | Built In
3 apr. 2025 · A firewall is a security device that monitors and regulates incoming and outgoing network traffic based on a set of rules. Here’s how firewalls work, their advantages, main types …
What is a firewall in networking? | Cloudflare
Firewalls protect networks by monitoring and controlling traffic based on defined rules. Learn what a firewall is, how it works, and explore key types.
What is a firewall and why do I need one? - TechTarget
19 mei 2025 · What is a firewall and why do I need one? A firewall is a network security device that prevents unauthorized access to a network by inspecting incoming and outgoing traffic …
What Is a Firewall? [Definition & Explanation] - Palo Alto Networks
A firewall is a network security solution that monitors and regulates traffic based on defined security rules and accepts, rejects or drops traffic accordingly.
Firewall | Definition, Types, & Facts | Britannica
Firewall, type of system used to monitor connections between computer networks. One of the earliest responses to malicious activity perpetrated through the Internet, firewalls became a …
What Is a Firewall? - Definition | Proofpoint US
A firewall is a type of network security system that analyzes incoming and outgoing network traffic, effectively serving as a barrier that blocks viruses and attackers based on …