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7.2 Farewall Security

A firewall is a network security device or software that monitors and filters network traffic based on security rules, acting as a barrier between private networks and external sources. It can be either a hardware device, like a broadband router, or a software program installed on a computer. The primary functions of a firewall include preventing unauthorized access, managing network traffic, and protecting against threats such as hackers and malware.

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17 views2 pages

7.2 Farewall Security

A firewall is a network security device or software that monitors and filters network traffic based on security rules, acting as a barrier between private networks and external sources. It can be either a hardware device, like a broadband router, or a software program installed on a computer. The primary functions of a firewall include preventing unauthorized access, managing network traffic, and protecting against threats such as hackers and malware.

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mrnirajbro
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© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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What is a Firewall?

A firewall can be defined as a special type of network security device or a software


program that monitors and filters incoming and outgoing network traffic based
on a defined set of security rules. It acts as a barrier between internal private
networks and external sources (such as the public Internet).

Firewall: Hardware or Software

A hardware firewall is a physical device that attaches between a computer


network and a gateway. For example, a broadband router. On the other hand, a
software firewall is a simple program installed on a computer that works through
port numbers and other installed software.
Functions of Firewall

As stated above, the firewall works as a gatekeeper. It analyzes every attempt


coming to gain access to our operating system and prevents traffic from
unwanted or non-recognized sources.

Since the firewall acts as a barrier or filter between the computer system and
other networks (i.e., the public Internet), we can consider it as a traffic controller.
Therefore, a firewall's primary function is to secure our network and information
by controlling network traffic, preventing unwanted incoming network traffic,
and validating access by assessing network traffic for malicious things such as
hackers and malware.

Importance functions of firewall

o Network Threat Prevention


o Application and Identity-Based Control
o Hybrid Cloud Support
o Scalable Performance
o Network Traffic Management and Control
o Access Validation
o Record and Report on Events

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