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17.10.2024
Internet
393
In today's world, cyber attacks pose more and more threats to the privacy of Internet users, so it is very important to take care of network security. And this is where a firewall or firewall comes in, which is designed to protect devices and data from possible attacks. Read more about what firewalls are, why they are needed and what varieties they come in in this article.
How a firewall works
Information between servers and computers on the Internet is transmitted as packets — small amounts of data. When a file is transferred, it is divided into packets, transmitted by the network, and reassembled on the spot according to specific instructions. The firewall's role in this process is to prevent unauthorized access to the network, block malicious traffic, and protect the data in each of these packets.
So, what is a firewall? It is a “virtual shield” that filters all traffic that passes through it according to predefined principles and rules.
It is important not to confuse a firewall with an antivirus. The former acts as a kind of Internet barrier that prevents malicious applications from entering the system by neutralizing them and dropping connections. The second fights viruses, worms, Trojans that have already penetrated the system by searching for and blocking them. Only the combined use of a firewall and compatible antivirus programs can guarantee complete security.
Types of firewalls and their features
According to different criteria, firewalls are divided into different types. Thus, according to the methods of deployment are distinguished:
According to the methods of traffic filtering are distinguished:
The choice between firewall types should be made based on your specific protection needs and network characteristics.
Why you need a firewall in Windows
A firewall is used to protect individual computers, laptops, mobile devices, and entire networks. It performs many functions, the main ones being:
The firewall also has additional functions:
However, it is important to realize that no firewall can provide 100% protection against DDoS attacks. If properly configured, they only increase the degree of protection, significantly reducing the effectiveness of such attacks.
How to enable and disable the firewall in Windows
A firewall is needed on any projects that are connected to the Internet network and regularly receive data from the “outside”. But keep in mind that because of the enabled “virtual wall”, the speed of traffic and OS operation is reduced. Therefore, if these parameters are important to you, you can turn off the firewall, weighing all the pros and cons of this solution.
You can configure the firewall in different ways. We will talk about them further.
How to configure firewall via command line
and press “Enter”. The system will then respond with an OK notification.
How to configure the firewall using the control panel
How to configure the firewall through the Windows Defender 10 (Windows Defender 10) interface
Then you get a system message that the firewall is activated and close all windows.
How to configure a firewall through the firewall monitor
In Windows 10 (11), the firewall has a window where you can configure the filter system. You can also enable and disable the firewall through this monitor. To turn it on, you need to:
After making the changes, be sure to restart the PC. The same method can be used to turn off the firewall if necessary.
With the high threats of cyberattacks and unauthorized access to the network, a firewall is essential in guaranteeing Internet security and protecting the confidentiality of information. We hope you now have an idea of what a firewall is and how to configure it.
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