Various types of firewalls can be implemented to control the traffic in and out of a private network. The network firewalls are categorized according to how they handle the data through them and the mechanism they utilize to route data. Therefore, a firewall helps an organization to have barriers or the boundaries between the trusted internal network and an untrusted external network like the internet (Kenworthy, 2014). This measure is to ensure that any person cannot access the most sensitive information of an organization. Thus, through firewalls, business organizations and the individuals have been able to have robust methods of protecting their data and confidential information from hackers or any other unauthorized persons. Additionally, business organizations need to ensure that they heavily invest in training and also sensitizing their employees about cybersecurity and its importance (Dodis & Stephens-Davidowitz, 2016). This will help the employees in an organization not to bleach the set policy or leaking the company’s sensitive information to other people. In a similar vein, organizations ought to have professionally trained and competent IT experts. They will be working for the organization to help them achieve the goal of securing their data information. There are various types of firewalls which can be implemented by organizations to ensure that the most confidential data of the organization are under high protection (Cooper & Guzik, 2014). These firewalls have different functions, and it is the organization that will decide which one to implement depending on their specific needs. The following are the types of firewalls:
Packet-based firewalls is one of the types of firewalls and it is widely used by most of the organizations. This is a firewall that is used in organizations to control and monitor the flow of packets in their network. This firewall is used explicitly by an organization to check an organization’s data and information. Packet firewalls work by filtering and matching nodes send over a network with specific predetermined rules and policies. Once the matching is done, the packet can be accepted or denied (Dodis & Stephens-Davidowitz, 2016). The whole process of controlling and monitoring the packets or nodes over the network is done based on the origin and the destination Internet Protocol (IP) addressee, protocols, and ports. Packet filtering is also known as static filtering and is some of the best, reliable, and highly efficient security frameworks or mechanism employed by many organizations in the various sectors (Cooper & Guzik, 2014).
Additionally, when it comes to packet filtering, the fact is that it checks the source and destination protocols like User Data Program (UDP) and Transmission Control Protocol. Through verification of sources and transmission of packets, the security is greatly enhanced since no harmful packet can be allowed to go through the organization’s network at any time, and that means the organization data is safe and cannot be accessed by any unauthorized persons (Kenworthy, 2014). Therefore, the main advantage of using a packet firewall is that an organization builds a reliable and robust network that only allows the transmission of secure data within and outside the organization. This mainly helps in reducing the cases of hacking and data breaches in the organization at all times (Cooper & Guzik, 2014). The diagram below illustrates the packet filtering process.
Packet-based firewalls is one of the most straightforward firewalls that controls data traffic by evaluating received data according to a given set of rules specified. After analyzing the received packets with the set rules, the packet can either be forwarded to the receiving host or dropped (Dodis & Stephens-Davidowitz, 2016). Once a packet is dropped, a message is sent to the packet source giving a description of what happened. The filtering rules depend on the manufacturer of the product. This firewall typically uses the following rules:
The other type of firewalls is Application-Level firewalls, and it is usually used in an organization to help them in monitoring, screening, or scanning and monitoring of network, internet, and local system access to and from an application or service. This firewall primarily deals with securing the processes and accessibility of applications or services in the organization (Kenworthy, 2014). Through this firewall, an organization establishes a robust way of ensuring that all external and internal activities are done through their apps. Additionally, there are two main types of application firewalls (Cooper & Guzik, 2014). The first one is the network-based firewall that deals with scanning and monitoring of network-based traffic for the application layer. The second type is the host application firewall that primarily deals with monitoring of all traffic flowing in and out of an application or service on a local computer or system.