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Windows XP client and PPTP server
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Settings for the Windows XP client
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Settings for Main office
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Windows XP client and L2TP server
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Settings for the Windows XP client
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Settings for Main office
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Content filtering
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Intrusion detection and prevention
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Traffic shaping
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Limit bandwidth to a service
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Limit bandwidth to one or more IP addresses
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Guarantee bandwidth to a service
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Appendixes
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Appendix A: ICMP Types and Codes
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Appendix B: Common IP Protocol Numbers
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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
z
Firewall Security
z
VPN Server/Client Supported
z
Content Filtering
z
Bandwidth Management
DFL-700 features an extensive Traffic Shaper for bandwidth
management.
z
Web Management
Configurable through any networked computer’s web browser using
Netscape or Internet Explorer.
z
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.
Page 8 / 131
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Introduction to Local Area Networking
Local Area Networking (LAN) is the term used when connecting several computers
together over a small area such as a building or group of buildings. LAN’s can be connected
over large areas. A collection of LAN’s connected over a large area is called a Wide Area
Network (WAN).
A LAN consists of multiple computers connected to each other. There are many types of
media that can connect computers together. The most common media is CAT5 cable (UTP or
STP twisted pair wire.) On the other hand, wireless networks do not use wires; instead they
communicate over radio waves. Each computer must have a Network Interface Card (NIC),
which communicates the data between computers. A NIC is usually a 10Mbps network card, a
10/100Mbps network card or a wireless network card.
Most networks use hardware devices such as hubs or switches that each cable can be
connected to in order to continue the connection between computers. A hub simply takes any
data arriving through each port and forwards the data to all other ports. A switch is more
sophisticated, in that a switch can determine the destination port for a specific piece of data.
A switch minimizes network traffic overhead and speeds up the communication over a
network.
Networks take some time in order to plan and implement correctly. There are many ways
to configure your network.
You may want to take some time to determine the best network
set-up for your needs.
Page 9 / 131
LEDs
Power:
A solid light indicates a proper connection to the power supply.
Status:
System status indicators, flashes to indicate an active system. If the LED has a
solid light the unit is defective.
WAN, LAN & DMZ:
Ethernet port indicators, Green. The LED flickers when the ports are
sending or receiving data.
Physical Connections
Console:
Serial access to the firewall software, 9600, 8bit, None Parity, 1Stop bit.
DMZ Port:
Use this port to connect to the company’s server(s), which needs direct
connection to the Internet (FTP, SNMP, HTTP, DNS).
Internal Ports (LAN):
Use this port to connect to the internal network of the office.
External Port (WAN):
Use this port to connect to the external router, DSL modem, or
Cable modem.
Reset:
Reset the DFL-700 to the original default settings.
DC Power:
connect one end of the power supply to this port, the other end to the
electrical wall outlet.
Page 10 / 131
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Package Contents
Contents of Package:
•
D-Link DFL-700 Firewall
•
Manual and CD
•
Quick Installation Guide
•
AC Power adapter
Note: Using a power supply with a different voltage rating than the one included
with the DFL-700 will cause damage and void the warranty for this product.
If any of the above items are missing, please contact your reseller.
System Requirements
•
Computer with a Windows, Macintosh, or Unix based operating system with an
installed Ethernet adapter
•
Internet Explorer or Netscape Navigator, version 6.0 or above, with JavaScript
enabled.

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