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Firewall: Traditional, UTM and NGFW. Understanding the difference One of the problem nowadays when we talk about firewalls is to understand what actually a firewall is and what means the acronym that are used to define the different type of firewalls. The common definition today recognizes 3 main types of firewalls: • Firewalls • UTM • NGFW But what are the differences (if any) between those things? Let’s start with the very basic: what a firewall is. Firewall: A firewall is software used to maintain the security of a private network. Firewalls block unauthorized access to or from private networks…