What is a firewall? In today’s article, we will talk about what is a firewall, why a firewall is used, how a firewall works, and the requirements of the firewall.
In addition, we will also discuss the types of firewalls in the article.
Most people who use computers and the internet have heard the word firewall and many of them know something about it.
However, very few people know what a firewall is or how it works.
The way we use a variety of security prevention methods and techniques to keep ourselves safe and secure in our daily lives,
In the same way, some computer protection is needed to keep a computer device working safely and securely.
However, to keep a computer system safe and secure, we use different types of security systems.
And the most widely used of these security systems are computer antivirus (antivirus) .
With a good antivirus, we can protect our computer system from various types of computer viruses and malware.
Antivirus software can only work if viruses or malware have already entered your computer.
In this case, the user’s system is not completely secure.
However, a firewall is a security system that allows malware and viruses to enter the computer before they enter.
Let us know in detail below what a firewall means and how a firewall works.
What is a firewall? (What is firewall in Bangla)
A firewall is a powerful computer security system that protects all types of computer devices and networks from hackers, malware, and viruses.
Firewall protection is primarily used to protect a computer or network so that viruses cannot enter the computer.
In addition, it prevents the virus from being transmitted from one computer to another.
There are various hackers who try to hack your computer or network by entering your computer network.
In this case, if you use firewall security, the security of your computer or network will be maintained by blocking the hacker’s request by the firewall.
A lot of times, when we use the Internet on a computer or access a variety of websites,
Many times different hackers or attackers try to install various unwanted applications or viruses in our computer system.
In this case a firewall security gives our computer complete protection from these internet attackers and hackers.
Thus, a firewall security works like an application software program or antivirus software.
Whenever our computer is connected to any private network or internet, this firewall starts keeping records of every unauthorize traffic access entered into the computer.
And every unauthorize traffic access will continue to inform the user about the information and will need to block harmful access.
Simply put, a firewall is a security wall between a computer and an Internet network.
So hopefully, what is a firewall? What does firewall mean? Got it.
How many types of firewalls and what are they? (Types of firewall)
Firewalls are basically of two types or two.
One of them is software firewall and the other is hardware firewall.
Let’s know in detail about each firewall.
It is a firewall security that can be easily installed in the computer.
Software firewalls are already provided in almost every Windows OS (7, 8, 10) that we know as Windows firewall .
This type of firewall works just like a hardware firewall.
Software firewalls protect different computers in different ways.
Software firewalls are a special type of computer software that is run in a computer / server.
Its main purpose is to protect your computer / server and to work on computer security by preventing viruses, attacks, malware from trying to enter from outside.
Hardware firewall is a much stronger and better firewall security.
These types of firewalls are in the form of separate physical devices that are relatively expensive.
Hardware firewalls are mainly used by large companies and organizations.
Most routers and modems already have this type of firewall installed.
And so, this firewall is located between the computer and the Internet gateway.
Hardware firewall protection is turned on in your computer whenever you connect your computer through your router or modem.
In this way, unauthorized access / traffic from outside is checked properly and if necessary, they are blocked.
Software-based firewalls are used for personal systems.
However, hardware firewalls are used in the case of business servers.
How does a firewall work?
You have already understood the work of firewall.
Its main function is to create a strong security system between computer / server and internet / network so that unauthorized access / traffic cannot harm your system in any way.
But now we know how the firewall system works.
Firewall is a 2 way protection system.
Whenever we access the Internet through our computers or other devices,
Then through the Internet, various kinds of harmful software, viruses, bots, etc. try to enter our system or network .
And this fear is present in the case of any computer device.
The firewall acts as a shield between this computer device and the internet network.
This firewall filters every request and traffic that enters the computer via the Internet.
And it blocks any kind of spyware, malware, virus, etc. before they enter your computer.
In this way, your computer/server etc. can work completely securely.
What are the benefits and advantages of firewall?
It is very important to have firewall protection on a computer device or server
Because, firewall has many advantages, benefits and advantages.
- The main advantage and advantage of firewall security is that it monitors the entire network traffic. The data and network traffic entering and leaving your system is filtered well so that the system is protected at all times.
- At present, new viruses are being created every day so that computer systems can be attacked. So, through firewall we can control the entrances of our system and avoid virus attack.
- There are a lot of hackers nowadays who try to hack people’s system and destroy or steal data, emails, systems, files etc. Even so, owning one is still beyond the reach of the average hacker.
- Spyware viruses are created to steal data from a person’s system. Firewall security also protects you from this type of spyware virus.
After knowing the benefits and advantages of firewall mentioned above, you may have better understood the need for firewall.