SMC Networks SMC7904WBRA Manuel d'utilisateur télécharger pdf (Page 92)

ONFIGURING

THE

ARRICADE

4-48

FIREWALL

The Barricade’s firewall inspects packets at the application layer, maintains

TCP and UDP session information including time-outs and the number of

active sessions, and provides the ability to detect and prevent certain types

of network attacks.

Network attacks that deny access to a network device are called Denial-of-

Service (DoS) attacks. 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

resources.

The Barricade protects against the following DoS attacks: IP Spoofing,

Land Attack, Ping of Death, IP with zero length, Smurf Attack, UDP port

loopback, Snork Attack, TCP null scan, and TCP SYN flooding. (See page

4-55 for details.)

The firewall does not significantly affect system performance, so we advise

leaving it enabled to protect your network. Select Enable and click the

“SAVE SETTINGS” button to open the Firewall submenus.

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SMC Networks SMC7904WBRA Manuel d'utilisateur Page 92