What is a Firewall ?

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Why do we need a Firewall?
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What is a Firewall? As the names indicate,
firewalls work as barriers or security layers
between your system and the threats of the cyber
world. A firewall is a type of hardware and
software that prevents unauthorized network
access, and it examines data flow using a set of
rules to detect and prevent threats.
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Why do we need a Firewall? Firewalls are used to
protect against network-based attacks and can
also aid in preventing application-layer threats.
So here, lets discuss some of the benefits of
using the firewall in a corporate and consumer
environment. 1. It prevents unauthorized
control access One of the worst things in-network
is when unauthorized users access your system.
And, of course, we don't want any unauthorized
access to control or seize our data. So to
prevent these kinds of unauthorized access, we
need to configure a firewall to prevent attackers
from taking unauthorized access. 2. Prevent
DoS Attacks A firewall is one of the resources
available to protect against DoS attacks, remote
access, and malicious macros. 3. It protects
old PCs and systems Despite the fact that Windows
XP and Windows 7 were released in 2001 and 2009,
some individuals continue to use them. Firewalls
safeguard these computers from viruses spread by
cybercriminals on the network.
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4. It makes online games safer One of the
teenagers most prominent streaming activities is
gaming, which poses a significant security risk.
Before you begin playing online games, it is
always good to have a firewall turned on. 5.
It blocks unsuitable or immoral content Firewalls
prevent suspicious activity and viruses,
prohibiting inappropriate and unethical
information, such as adult websites. 6. It
may be hardware or software As we all know, a
firewall does not always contain software
nonetheless, most homes have hardware-software
incorporated into the router. Hardware firewalls
are installed on physical systems or devices
based on the customer's needs and suitability.
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• Type of Firewall
• When it comes to firewall types, there are four
  primary groups based on how they filter data.
• A packet-filtering firewall examines the packets
  in isolation when it doesn't know the context of
  the packet.
• A stateful inspection firewall checks network
  traffic to see if one packet is connected to
  another.
• A proxy firewall determines packets at the
  application layer of the OSI model
• A Next-Generation Firewall (NGFW) merges
  organizational firewall features with an
  Intrusion Prevention System (IPS) and application
  control using a multilayered approach.

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Final Words In network security, the concept of
a firewall is relatively broad. If you want to
learn more about firewalls, check out
InfosecTrain's Network Security training course.




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About InfosecTrain

• Established in 2016, we are one of the finest
  Security and Technology Training and Consulting
  company
• Wide range of professional training programs,
  certifications consulting services in the IT
  and Cyber Security domain
• High-quality technical services, certifications
  or customized training programs curated with
  professionals of over 15 years of combined
  experience in the domain

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