Firewall (computing) - Wikipedia
In computing, a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. A firewall typically establishes a barrier between a trusted internal network and untrusted external network, such as the Internet.. Firewalls are often categorized as either network firewalls or host-based firewalls.
What Is a Firewall? - Cisco
Firewalls have evolved beyond simple packet filtering and stateful inspection. Most companies are deploying next-generation firewalls to block modern threats such as advanced malware and application-layer attacks.. According to Gartner, Inc.’s definition, a next-generation firewall must include:
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How Firewalls Work | HowStuffWorks
Firewalls have helped protect computers in large companies for years. Now, they're a critical component of home networks, as well. See how firewalls work.
What is firewall? - Definition from WhatIs.com
In computing, a firewall is software or firmware that enforces a set of rules about what data packets will be allowed to enter or leave a network. Firewalls are incorporated into a wide variety of ...
Firewall Definition (Security) | Webopedia
A firewall is a network security system designed to prevent unauthorized access to or from a private network.Firewalls can be implemented as both hardware and software, or a combination of both.Network firewalls are frequently used to prevent unauthorized Internet users from accessing private networks connected to the Internet, especially intranets. ...
Next-Generation Firewalls (NGFW) - Cisco
Next-Generation Firewalls. Prevent breaches, get deep visibility to detect and stop threats fast, and automate your network and security operations to save time and work smarter.
SonicWall Firewall - Information & Pricing - Firewalls.com
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