FortiGate modes

FortiGate modes The FortiGate unit has a choice of modes that it can be used in, either NAT/Route mode or transparent mode. The FortiGate unit is able to operate as a firewall in both modes, but some of its features are limited in transparent mode. It is always best to choose which mode you are […]


UTM/ NGFW Unified Threat Management and Next Generation Firewall are terms originally coined by market research firms and refer to the concept of a comprehensive security solution provided in a single package. It is basically combining of what used to be accomplished by a number of different security technologies all under a single umbrella or […]

Proxy servers

Proxy servers A proxy server is an appliance or application that acts as an intermediary for communicating between computers. A computer has a request for information. The packets are sent to the designated resource but before they can get there they are blocked by the proxy server saying that it will take the request and […]

Network layer or packet filter firewalls

Network layer or packet filter firewalls Stateless firewalls Stateless firewalls are the oldest form of these firewalls. They are faster and simple in design requiring less memory because they process each packet individually and don’t require the resources necessary to hold onto packets like stateful firewalls. Stateful firewalls inspect each packet individually and check to […]

What is a firewall?

What is a firewall? The term firewall originally referred to a wall intended to confine a fire or potential fire within a building. Later uses refer to similar structures, such as the metal sheet separating the engine compartment of a vehicle or aircraft from the passenger compartment. A firewall can either be software-based or hardware-based […]