Network Firewall

What Is Network Firewall?

A network firewall is a security system designed to protect a private network from malicious or unauthorized access. It is a combination of hardware and software that inspects incoming and outgoing network traffic and blocks any malicious or unauthorized traffic.

Description

A network firewall works by inspecting incoming and outgoing network traffic and comparing it against a set of predefined security rules. If the traffic matches a rule that identifies it as malicious or unauthorized, the firewall will block it. Network firewalls can be used to protect against a wide range of threats, including phishing attacks, malware, and unauthorized access attempts.

Usage and Examples

Network firewalls are used by organizations of all sizes to protect their private networks from malicious or unauthorized access. They can be deployed at the perimeter of a network, between network segments, or at individual endpoints. Examples of network firewall products include Cisco ASA, Palo Alto Networks, and Check Point.