How does it Work and Function of the Firewall?

How does it work and function of the firewall? - A firewall can be a software (computer program or application) or hardware (a dedicated computer running a firewall program) which serves to filter the traffic of computer networks and the Internet.

Firewall protection is needed primarily to computers connected to the internet connection.

Firewall improve computer network security by providing detailed information on network traffic patterns.

Firewall indispensable as the security gateway between the internal network that is relatively safe with the external network (the Internet) is vulnerable.

How Firewalls Work

1. All network communications pass through the firewall
2. Only the data traffic from the trusted network that is allowed through the firewall
3. Firewall can protect your computer from malicious attacks originating from the Internet

Function Firewall

1. The computer has thousands of ports that can be accessed for a variety of purposes.
2. Firewall computer has shut down ports except some ports need to remain open.
3. Firewall on a computer acting as the first line of defense in preventing all kinds of hacking.
4. Hackers work by trying to break into computer networks via an open port.

Also, there are also a variety of other uses of the firewall as follows:

1. Firewall is useful to maintain confidential and valuable information to keep it out without being noticed by the user.

For example, the traffic is FTP (File Transfer Protocol) computer network of an organization controlled by the firewall.

This is done to prevent users on the network to send confidential files either intentionally or unintentionally to other parties.

2. Filter firewall is also used to prevent certain traffic flowing into the network subnet.

It is useful to prevent users from sharing music and play games on the network. This type of application is particularly useful in the corporate sector.

3. Another significant use of a firewall is to modify the data packets coming through the firewall.

This process is called Network Address Translation (NAT). There are types of so-called basic NAT, NAT in which a private IP (Internet Protocol) address of a computer network is hidden behind a single IP address.

This process is called IP masquerading which helps users in a network that consist of a system without a public IP address to access the Internet.

4. The accuracy of data such as financial information, product specifications, product prices is vital for the survival of any business.

If the information is changed by an external source, this can lead to the collapse of the company's business. A firewall prevents modification of website data by unauthorized parties.

Developments Firewall

Firewall technology is now very sophisticated. Previously, the firewall works by filtering network traffic using IP address, port number, and protocol. But this time, the firewall can filter data by identifying the content directly.

With the help of firewalls, sensitive information can be prevented from spreading to outsiders. A firewall is a valuable asset to an organization that must be configured correctly.