What is firewall? How firewall is used to secure computer system?

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A Firewall is a network security device that monitors and filters incoming and outgoing network traffic based on an organization’s previously established security policies.

A firewall can help protect your computer and data by managing your network traffic. It does this by blocking unsolicited and unwanted incoming network traffic. A firewall validates access by assessing this incoming traffic for anything malicious like hackers and malware that could infect your computer.

It regulates the traffic between your computer and the Internet and cannot be missing on any computer with an Internet connection these days.

If you do not use a firewall, other people can easily gain access to your computer. This not only endangers the security of your computer, also your personal data are in the highest danger.

Once a stranger has gained access to your system, they can view your data and modify or delete the data. And not only that, he can also leave data on your computer.

However, these are rarely useful data. Rather, these are malware, such as computer worms or Trojans, which spy on your PC or harm considerably.

So if you want to create optimal protection on your PC, a firewall must not be missing.

Only by using a firewall in conjunction with an anti-virus program, can approximately optimal protection against attacks from the network and comprehensive anti-virus protection be ensured.

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