Unified Threat Management (UTM) FirewallsĪ packet filtering firewall is the most basic type of firewall.Network Address Translation (NAT) Firewalls.Stateful Multi-layer Inspection (SMLI) Firewalls.Application-level Gateways (Proxy Firewalls).The following are types of firewall techniques that can be implemented as software or hardware: This type of firewall is also called a Host Firewall.īesides, there are many other types of firewalls depending on their features and the level of security they provide. On the other hand, a software firewall is a simple program installed on a computer that works through port numbers and other installed software. A hardware firewall is sometimes referred to as an Appliance Firewall. However, it is best practice to have both to achieve maximum possible protection.Ī hardware firewall is a physical device that attaches between a computer network and a gateway. Each type of firewall has different functionality but the same purpose. There are mainly three types of firewalls, such as software firewalls, hardware firewalls, or both, depending on their structure.
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