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A firewall is a protective barrier established by individuals, organizations, businesses, and government agencies to prevent unwanted information access into the internal network system.
What is the purpose of a firewall?
The fundamental task of a firewall is to control data traffic between two regions with different levels of trust, typically including:
- Internet Network (untrusted zone).
- Internal Network (a highly trusted zone).
The ultimate purpose of a Firewall is to establish controlled connections between zones with different trust levels by applying a security policy and connection model based on the principle of least privilege.
What types of Firewalls are there?
There are 2 common types of Firewalls:
- Protective Firewalls safeguard individual computers or local networks, preventing intrusion and attacks from external sources.
- Restrictive Firewalls, typically set up by Internet service providers, have the task of blocking access to specific websites or servers, often used for internet filtering purposes.
Why is it necessary to use a Firewall?
The internet is expanding widely, offering immense benefits. However, it also brings numerous undesired elements for individuals, parents, organizations, businesses, government agencies, such as inappropriate websites based on age, mission, interests, ethics, laws, or unfavorable information exchange for individuals and businesses. Hence, they (individuals, organizations, agencies, and the government) use Firewalls to prevent such incidents.
Firewalls play a crucial role in preventing hazardous elements like hackers, worms, or various viruses before they can infiltrate our computers.
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