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Sunday, February 9, 2025

Each of us uses a network dam. What is the rightly firewall?

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You have probably heard more than once about banking accounts or data theft. But you once wondered why yours computer Has the phone not yet fell victim to such an attack? It is thanks to the network dam, which non-stop is guarding what comes in and leaves your device.

What is a firewall?

The network dam is a security system that It controls all internet traffic coming and coming out of your device. It works like a filter – it analyzes every connection and decides based on certain rules what can go and what will be blocked. Its main task is to protect your computer or smartphone against unauthorized access from outside, as well as control of what data is sent outside.

How does it work in practice?

Imagine being on a website. In a split second, Firewall checks:

  • Is this page not on the black list
  • What data wants to download from you
  • What is trying to install on your computer
  • Is it not trying to steal your data

It all happens automatically, without your knowledge. Sometimes you only see the message “The network dam blocked this page” – that is, the system has detected something suspicious.

What kind of firewall do we have?

There are two main categories:

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  • Hardware firewall – This is a separate device that guards the entire network. You will find it in companies and more advanced home installations. It is often built into the router.
  • Program firewall – This is an application installed on your computer. Windows has its own dam (Windows Defender), but you can also install more advanced programs.

What does the firewall protect us against?

The network dam is your first defense line before:

  • Hackers trying to break into your computer
  • Malware
  • Theft of personal data
  • Attacks that can suspend your system
  • Unauthorized access to your files

Do I need an additional firewall?

Your operating system already has a built -in network dam. For most users, that's enough. An additional firewall will be useful if:

  • You store sensitive data
  • You run a company
  • You often work in public Wi-Fi networks
  • You want to have more control over network traffic

Do not turn off the firewall!

Sometimes it tempts to turn off the dam – especially when it blocks something that we want to install. However, this is a serious mistakewhich can cost you the security of your data. If any app It does not work correctly, you always have the opportunity to add it to trusted programs in the Firewall settings.



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