Smc-networks SMCWBR14S-N2 Manuel d'utilisateur télécharger pdf (Page 101)

IREWALL

4-49

Firewall

The Barricade 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 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.

(For details see“Intrusion Detection,” page 4-56.)

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

enabling the function to protect your network.

Select Enable and click the SAVE SETTINGS button.

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Smc-networks SMCWBR14S-N2 Manuel d'utilisateur Page 101