Understanding and How Firewall Works

You may have heard of firewalls, but what is a firewall? Does the firewall stop the virus? Can you not use a firewall? Actually, there is a possibility that you are using a firewall now - if your computer is running a modern operating system, there will be one firewall installed. Or maybe, your security suite is equipped with a firewall. Intrigued by the definition and workings of a firewall? Check out the information below
Understanding and How Firewall Works
Understanding firewall
Simply put, a firewall is a computer network security system that functions to protect computers from various types of attacks from outside computers. Firewall monitors and controls all incoming and outgoing network traffic that you do based on established security rules.

In general, computer firewalls are software programs that prevent unauthorized access to or from private networks. So, a firewall is a tool that can be used to improve the security of computers connected to the network, such as LAN or the Internet. 
Firewalls are also an integral part of a comprehensive security framework for the networks you use. Firewall is able to guarantee security through activation of granular control over the type of function. Firewall will also establish a system process that has access to network resources.
Most people think that a firewall is a device that is installed on a network, and controls the traffic that passes through a network segment. However, you can also have a host-based firewall that can run on the system itself, such as ICF (Internet Connection Firewall). Basically, the functions of both firewalls are the same: to stop intrusion and provide a strong access control policy method. In a simple definition, a firewall is nothing but a system that protects your computer; points of enforcement of access control policies.

Benefits of a firewall
A firewall that is a barrier intended to protect your PC, tablet or cellphone from the dangers of data-based malware on the Internet has several benefits:

Protecting a computer from remote access is invalid.
One of the worst things that can happen to your computer is if someone tries to take control remotely. Seeing the mouse move on the monitor because of hackers is certainly scary. 

With a properly configured firewall (and modern OS), you can deactivate remote desktop access, thus preventing hackers from taking over your computer.

Can block messages that link to unwanted content. The internet has a lot of bad code that crosses the virtual world, waiting to pounce on unprotected PCs.

A firewall can prevent this from happening. Make online gaming safer. Any attempt by hackers to use their malware to enter your system will be blocked, making your system safe.

How the firewall works
When your computer has firewall protection, everything in and out of the computer will be monitored. Firewalls monitor all information traffic to allow 'good data' to enter, and block 'bad data' from entering the computer. Firewall uses one or more of the three methods below to control the traffic flowing in and out of the network: 
  1. Package filtering. Packages (small pieces of data) are analyzed against a set of filters. Packages that pass through filters are sent to the requested system, while other packages are discarded. Proxy service. 
  2. Information from the Internet is taken by a firewall and then sent to the requested system and vise versa. Stateful inspection. A newer method that does not check the contents of each package but compares certain key parts of the package with a trusted information database. 
  3. Information from inside the firewall outside is monitored to determine specific characteristics, then the information entered is compared to these characteristics. If the comparison produces a reasonable match, the information is allowed to enter. If not, discarded.
That is information about understanding the firewall along with the benefits and how it works. You should also use a firewall to make the network more secure. May be useful

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