Smc-networks SMC7904BRA Manual de usuario descargar pdf (Pagina 85)

ONFIGURING

THE

ARRICADE

ADSL R

OUTER

4-40

FIREWALL

The Barricade ADSL Router’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 firewall function of the Barricade ADSL Router 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 4-47 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 SMC7904BRA Manual de usuario Pagina 85