What is Firewall? | How Much The Firewall is Necessary for you? | TechBuf

Firewall’s name is nothing new in this computer and the internet world. I will talk today, what is the firewall? How does it work? And how important is it for your computer? Before going deeper into the post, I told that I had posted a detail about the encryption, you can come to see it.

Firewall ???

Friends, what is the firewall? And how does it work? If I tell you these two things, then you will know how much it is necessary for your computer! For example, outside the world of equipment, the firewall is a type of protection that does not allow the external fire to enter and does not let the inner light go outside. This way, the Fire Wall protects you from both sides. If you talk about firewalls in the computer world, it is such protection, whenever you use the internet through your computer and access any website, watch online videos and browse a web site or send mail.

At this time, the Firewall protects your computer. Unwanted access to something Many times when using the Internet, unwanted software, malware, etc. entered the computer without any permission. And after entering, your computer files or system will damage. The firewall permits just the trusted site to keep the file on your computer. All additional software, malware, etc. prevent the computer from entering without permission.

Just think, your computer has a virus, and it connected to a local network. There are more than 10-20 computers connected (as it is in your office). So your computer has been infected by viruses, but the firewall works as a protection for computers in your local network so that it can not spread the virus.

Types of Firewalls


Friends, it is available in two categories. One is the hardware-base firewall and another software-base firewall. Let’s discuss a few things about its kind.

Hardware-based firewalls seen in the router. Apart from that, the dedicated firewall appliances are available to buy on the market. These devices provide one type of hardware protection. Suppose I bought a router from the market and with this, I connected ten devices to the internet. Now if the FireWall is turned on in my router, the router will bring ten connected devices to my firewall under protection.

Router firewall

Ethical hacking

How does this router firewall work, whenever you enter an internet website or send a request from your browser to open, your network ID included with your submitted request, The router sends the request to the desired server as a packet? When the return packet reaches to the router from the server, that package also contains your network ID. Router can recognize real packets and send them to your device. If there is a packet in the router that does not have your network ID, then the firewalls can block it instantly.

Various antivirus manufacturers such as Avast, Norton, AVG, McAfee, etc. provide firewall protection with their antivirus. Moreover, there is a firewall on the default side of Windows. Software-based also work similarly to hardware-based firewalls. They have done a lot of work, think that you installed a game on your system or computer or installed software, and if the game or software is recuperating for an internet connection, then you will get a popup from the firewall on your computer.

Until the Internet granted permission, the software you install will not be able to send or receive any data using the Internet. Windows’s Fire Wall always monitors it as if your computer is out of Going Traffic and where incompetent traffic is their source, their IP address keys, whether they are trusted, or incomplete traffic is installing unwanted software. These subjects will decide which data to come and block any of them.

Firewall requirements

What is firewall

You may think, “It is a very annoying subject, to allow for all software repeatedly, comes popup frequently” etc. But I would say it’s a pretty good thing. If it was not there anyhow, your computer could encounter attacks from anywhere. You will not have any conditions to prevent it. You may be using the Internet on Google dot com, but from where any software can installed on the computer you will not be able to get it. The software can enter your computer and steal your data, take your online account information or your credit card information. Whether it is a hardware-based firewall or a software based, you need a firewall if you use the Internet on your computer, because there are many virus sites in the web world.

Software on your computer often comes in the form of antivirus, but this software itself is a kind of virus. Sometimes you enter a site, and you receive the message “Your system memory is low” or “Your device has been infected with viruses, clean it now” etc. Whenever you read these words, when you click them, any software is downloaded to your computer. This software will do the memory jam without having to clean the memory. It is more important to have a firewall on your computer to avoid these unwanted things.

At Last

Now you understand clearly that what is the firewall? How does it work and why it is necessary? Hope you will use it on your computer. Now you know how much need it. Since this is a security question, tell all your friends by sharing this post. If you have better information about this topic or have any questions, then please let me know and comment below.

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Shushanta Kumar

Founder and CEO of TechBuf blog, also a regular TechBuf contributor. I'm a pretty skilled writer. Try to increase Tech related content.

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