Today we are going to talk about, what is firewall  ? All of us humans take care of one thing in our mind to do any small and big thing in our life and that is “security” i.e. security.

For example, people save money for their future in advance so that when they need money later, they will not have to spread their hands in front of anyone.

To protect the safety of their children, parents stay with them at every step. Bodyguards are kept for the safety of those who are great celebrities and ministers. ” Law ” has been made to protect the people living in every country .

Every day on the border, the brave soldiers of our country give their lives for the safety of all of us.

The life of all of us is in a security circle in some way, due to which we are breathing peace.

In the same way, the computer also needs a security so that it can be protected from viruses and malware and all the data kept in the computer cannot be touched by another unknown person.

The name of that security is ” Firewall “. People who use computer and Internet more must have heard the name of firewall. What is firewall? Why is this important? Today I am going to tell you about it.

What is firewall


Firewall is a system to protect computers that protect all types of computers and its networks from intruders, hackers and malware.

Firewall protects our computer from invasive software that secretly comes inside our computers and passes all personal details to the hackers who send the software that exploits it very poorly.

Firewall is a type of security scheme that either exists as a software programs or a hardware As a device, whenever our computer connects to the internet, then this firewall prevents the traffic coming towards our computer from coming in.

For example, let me tell you that whenever we go to a website using the internet in the computer, or watch some videos, as well as download them or anything else on the Internet.

While working, the firewall stops whatever traffic is coming towards our computer, it creates a wall in our computer network so that any unwanted software comes in and automatically installs in the computer.

Should it happen Oi unwanted comes not in files Computer gets to the attack because of the virus on Computer and all that data you can delete.

Firewall only gives space for those things that we allow users to come in. Apart from this, no malware or virus is allowed inside.

In the same way, if a virus is already present in our computer and many computers are connected together in a network in a room, then the firewall prevents the virus of one computer from reaching other computers.

This means that the firewall performs security work on both sides.

What are the different types of Firewall?

There are two types of Firewall: One is Software Firewall and the other is Hardware Firewall .

1# Hardware Firewall


Hardware Firewall is already present in all the routers these days, whose job is to prevent the virus from going from one computer to another.

For example, suppose 10 computers in a room are connected to the same network and the firewall has been enabled in the router or modem being used there, then all the computers are connected with that router.

The firewall automatically starts working. Whenever anything is done on the Internet through computers, the firewall there keeps computers safe from viruses and malware.

Every request received from computer is a data packetOut of the form and the ID of the network remains connected with it, whenever a reply to that request comes from the server, then the same network ID comes connected with the packet so that the firewall knows that data is correct.

Apart from this, if any other packet tries to enter inside with that packet, then the firewall stops it.

The second task of the firewall is that if a virus comes from anywhere in a computer, then the virus can not get out of that computer and reach the other computer.

2# Software Firewall

software firewall

In newer generations of Windows Operating Systems like Windows 7, 8, 10, Vista, XP etc., the firewall is already inbuilt and is by default “on” so that the computer is completely protected.

If you want, you can also change it according to your need by looking at its settings in computers.

Apart from this, many antivirus are also present in the internet such as Avast , McAfee , Norton , QuickHeal Istadi , all these also have the same work of firewall.

Whenever we install new software or games in our computers, a popup box appears in our computer.

In which the firewall asks for permission from the user whether you have to install this program in your computer because Windows firewall has blocked this program, so if we want, we can install the program by ticking that option.

Software firewall works in computer like this and keeps our personal data from hackers and virus.

Whether it is hardware or software, it is very important to use firewall in computers because there are many malicious sites in the internet which can sneak into our computer and steal data.

Hope you know what is firewall,  and why is it important? Must have understood. If you have not used it in your computer yet, then do it and keep your computer safe.