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Stateful firewall - In computing, a stateful firewall (any firewall that performs stateful packet inspection or stateful inspection) is a firewall that keeps track of the state of network connections (such as TCP streams) traveling across it. The firewall is programmed to know what legitimate packets are for different types of ...
Stateless firewall - In computing, a stateless firewall is a firewall that treats each network frame (or packet) in isolation. Such a firewall has no way of knowing if any given packet is part of an existing connection, is trying to establish a new connection, or is just a rogue packet.
Application firewall - An application firewall limits the access which software applications have to the operating system services, and consequently to the internal hardware resources found in a computer, much as a car firewall limits access of heat, or even fire, to the passengers of the vehicle. The reason that application firewalls are needed in today's internet and data-sharing world is that the other types of firewalls in existence do not control the ...
Windows Firewall - Windows Firewall is a personal firewall, included with Microsoft's Windows XP, Windows Server 2003, and Windows Vista operating systems.
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