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: