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D-Link Product Guide 2008

IPS FIREWALLS

The IPS (Intrusion Prevention System) firewalls provide an all-in-one business-class security solution with integrated functions including

firewall, load balance, fault tolerance, content filtering, user authentication, Denial of Service (DoS) protection, Virtual Private Network

(VPN) remote connection and malicious internal traffic prevention. These firewalls come with multiple user-configurable interfaces,

including high-speed Gigabit ports, for flexible, bottleneck-free network deployments linking different workgroups and enterprises

together.

D-Link NetDefend firewalls adopt a unique IPS technology - component-based signatures, which are built to recognize and protect

against all varieties of known and unknown attacks, and which can address all critical aspects of an attack or potential attack including

payload, NOP sled, infection, and exploits. In terms of signature coverage, the IPS database includes attack information and data from

a global attack sensor-grid and exploits collected from public sites such as the National Vulnerability Database and Bugtrax. These

firewalls deliver high quality IPS signatures by constantly creating and optimizing NetDefend signatures via the D-Link Auto-Signature

Sensor System. Without overloading existing security appliances, these signatures ensure a high ratio of detection accuracy and the

lowest ratio of false positives.

To minimize any impact of a disaster on an entire network, D-Link NetDefend firewalls include a special feature called ZoneDefense - a

mechanism that operates seamlessly with D-Link xStack switches to perform proactive network security. ZoneDefense automatically

quarantines infected computers on the network and prevents them from flooding the network with malicious traffic.

D-Link NetDefend firewalls can be remotely managed via a web-based interface or through a dedicated VPN connection. They include

flexible features to monitor and maintain a healthy and secure network, such as e-mail alerts, system log and real-time statistics.

1. User requests a

web page.

Public web server.

2. A global database is queried for the

category of the web page.

2b. If the database does not contain the

requested information, the web page

is downloaded by the database and

analyzed using several techniques.

3. If granted by the corporate surfing policy, the user

will gain access to the requested website.

Surfing Policy

Adult: Blocked / Shopping: Blocked / News: Allowed

Multiple replicated databases are deployed worldwide

to maximize performance and availability.

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D-Link DSL-2320B - 24 Mbps DSL Modem Guía de usuario Pagina 50