Introduction; Features And Benefits; Firewall Security; Bandwidth Management - D-Link DFL-1100 Manual

Introduction

The DFL-1100 provides four 10/100MB Ethernet network interface ports, which are (1)
Internal/LAN, (1) External/WAN, (1) DMZ port and (1) port that can be configured as High
Availability Sync port or as ETH4 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
High Availability

Bandwidth Management

DFL-1100 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. Like
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 watches all of the information moving to and from your network and analyzes
each piece of data. Each piece of data is checked against a set of criteria that the
administrator configures. 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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