Literature ReviewThe Oxford Dictionary gives meaning to firewall as a part of a computer system that prevents people from obtaining information without authorization, but nevertheless allows them to receive the information sent to them. The word firewall was also used by Lightoler (1764) to describe walls that separated parts of a building, saving both lives and property. In the late 1980s, firewall network security was used to distinguish one network from another. Firewall can also be defined as a system or group of systems having two networks through an access control policy. These days, Internet security is a major consideration when someone starts an organization. This is because, using a firewall. It can protect and protect an organization's secret data and files. The firewall is very important because it helps to minimize the risk of confidential information. It can also preserve data and files. In the past, the organization didn't really know about the firewall. They also don't care about the importance of the firewall. Indeed, there are not many users like today. Hardware and software are combined to make the firewall. Access control policies, strengthen the security of the enterprise and others constitute the effective firewall created in the markets. Firewall provides benefits to any organization that uses it and has it in its systems. The benefits they enjoy are security and auditing. The organization chooses the firewall because it provides high security that can save all the data and files. If the firewall is not used by the organization, it can expose the created system to intruders like hackers and spies. The demand on the firewall is very high for ...... middle of paper ...... which allows traffic and which exists to block traffic. Whether a company wants to place more emphasis on allowing or blocking traffic depends on the people who set that company's security policies. A company should not leave this to the discretion of the service or product that will provide security, because only the company knows what type of protection it needs. If a business is unsure of the type of protection needed, many vendors can help it set up a secure network (see Chapter 4). Firewalls are designed to protect your network from attacks originating from another network. An effective firewall will allow authorized access only to the protected network and deny access to those who do not have it. Some firewalls only allow email traffic through them, protecting the network from