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the Stateful Packet Inspection heading, all the incoming traffic will be
blocked except the FTP connection initiated from the local LAN.
• Stateful Packet Inspection
This option allows you to select different application types that are using
dynamic port numbers. If you need to use the Stateful Packet Inspection
(SPI) for blocking packets, check the radio button in the “Enable SPI and
Anti-DoS firewall protection” field and then check the inspection type that
you need, such as Packet Fragmentation, TCP Connection, UDP Session,
FTP Service, H.323 Service and TFTP Service.
• Hacker Prevention Feature
The Wireless Barricade firewall inspects packets at the application layer,
and maintains TCP and UDP session information, including timeouts and
number of active sessions, provides the ability to detect and prevent certain
types of network attacks such as DoS attacks.
Network attacks that deny access to a network device are called
denial-of-service (DoS) attacks. Denials of Service (DoS) attacks are aimed
at devices and networks with a connection to the Internet. Their goal is
not to steal information, but to disable a device or network so users no
longer have access to network resource.