Types of firewalls

Application filtering is one of the most difficult types of filtering that firewalls perform, because it requires the firewall to process the data at the application layer (Layer 7) of the OSI model

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SecureNAT Client The SecureNAT client is effectively any device that attempts to communicate through the ISA Server 2004 firewall without being configured as one of the other firewall types

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This section focuses on the technologies used in various firewalls and how they work. The firewall taxonomy in Figure 2-1 shows the general types of firewalls.

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The first question to ask when implementing a firewall is whether the firewall is going be located at a central location or a remote location.

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Bấm chuột phải lên Desktop chọn chọn New shortcut Type the location of the item: gõ vào netsh firewall set opmode disable Next Đặt tên tùy chọn cho Shortcut. VD: Disable Firewall 

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