SMC Networks SMC7904BRB2 manual 4-42, Firewall

CONFIGURING THE BARRICADETM

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 page 4-49.)

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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