What is a Firewall? The Different Firewall Types

Packet filtering firewall

Packet filtering firewalls are installed inline at the points where devices like routers and switches perform their functions. These firewalls, on the other hand, do not route packets; instead, they compare each one to a set of pre-defined criteria, such as allowed IP addresses, packet type, port number, and other aspects of the packet protocol headers.

Software firewall

On the host device, a software firewall is installed. As a result, a Host Firewall is another name for this type of firewall. It must use its resources to work because it is attached to a specific device. As a result, it will inevitably consume some of the system’s RAM and CPU. You must install the software on each device if you have more than one. It necessitates individual configuration for each because it must be compatible with the host. As a result, the most significant disadvantage is the time and expertise required to administer and manage firewalls for each device.

Hardware Firewalls

Hardware firewalls, as the name implies, are security devices that sit between an internal and external network as a separate piece of hardware (the Internet). An Appliance Firewall is another name for this type of firewall. A hardware firewall, unlike a software firewall, has its own resources and does not use the host devices’ CPU or RAM. It’s a physical device that acts as a gateway for traffic flowing into and out of a corporate network. They’re used by medium and large businesses with multiple computers connected to a single network. In such cases, hardware firewalls are more practical than installing separate software on each device.

Stateful Inspection Firewalls

These firewalls combine packet inspection and TCP handshake verification to provide a level of security that neither of the previous two architectures could provide on their own. These firewalls, on the other hand, put a greater strain on computing resources. When compared to other solutions, this may slow down the transfer of legitimate packets.

Cloud/hosted firewalls

Cloud-based firewalls are available from managed security service providers (MSSPs). This hosted service can be used to monitor both internal network activity and on-demand environments from third parties. Cloud-based firewalls, also known as firewalls as a service, can be completely managed by an MSSP, making them a good option for large or widely distributed enterprises with security resource gaps. Smaller businesses with fewer resources and expertise may benefit from cloud-based firewalls.

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A firewall is mandatory in a business infrastructure as it protects a company’s network and computers from cyber threats and malicious network traffic. Cyber legend technologies LLC is the best Firewall Supplier in Dubai .