Introduction; Features And Benefits; Introduction To Firewalls - D-Link DFL-700 Manual

Introduction

The DFL-700 provides three 10/100M Ethernet network interface ports, which are (1)
Internal/LAN, (1) External/WAN, and (1) DMZ port. It also provides easily operated software
WebUI that allows users to set system parameters or monitor network activities using a Web
browser.

Features and Benefits

Firewall Security
VPN Server/Client Supported
Content Filtering
Bandwidth Management
The DFL-700 features an extensive Traffic Shaper for bandwidth
management.
Web Management
Configurable through any networked computer's Web browser using
Netscape or Internet Explorer.
Access Control supported
Allows you to assign different access rights for different users, such
as Admin or Read-Only User.

Introduction to Firewalls

A firewall is a device that sits between your computer and the Internet that prevents
unauthorized access to or from your network. A firewall can be a computer using firewall
software or a special piece of hardware built specifically to act as a firewall. In most
circumstances, a firewall is used to prevent unauthorized Internet users from accessing
private networks or corporate LAN's and Intranets.
A firewall monitors all of the information moving to and from your network and analyzes
each piece of data. Each piece of data is then checked against a set of criteria configured by
the administrator. If any data does not meet the criteria, that data is blocked and discarded. If
the data meets the criteria, the data is passed through. This method is called packet filtering.
A firewall can also run specific security functions based on the type of application or type
of port that is being used. For example, a firewall can be configured to work with an FTP or
Telnet server. Or a firewall can be configured to work with specific UDP or TCP ports to allow
certain applications or games to work properly over the Internet.
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