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Firewall, a critical security tool in network security, has become indispensable for businesses. This system monitors and controls incoming and outgoing network traffic based on predefined security rules, serving as the first line of defense for network security with historical significance.

What is a Firewall?

Firewall can be hardware-based, software-based, or a combination of both. Its primary purpose is to protect the network against external threats such as hackers, viruses, and malware.

It provides this protection by monitoring and controlling incoming and outgoing network traffic according to specific rules. For example, a firewall may allow traffic from a trusted source while blocking traffic from an untrusted source.

How Does a Firewall Work?

Among the prominent types of firewalls are Proxy Firewall, Unified Threat Management (UTM) Firewall, Stateful Inspection Firewall, Next-generation Firewall (NGFW), and Threat-focused NGFW.

Firewalls are used to enhance network security, prevent unauthorized access to sensitive data, and ensure compliance with standards. Before deployment, the network's needs should be carefully assessed, and the appropriate solution chosen.

What are Firewalls?

  • 1-Network Firewall......
    It controls the network and monitors traffic across the internet.
  • 2-Host Based Firewall......
    It is installed on a single computer and controls traffic from that computer.
  • 3-Web Application Firewall......
    It protects web-based applications from attacks such as XSS and SQL injection.
  • 4-Cloud Firewall......
    Protects cloud resources against external threats.

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