D-Link DI-724U Router Manual PDF (Setup & Configuration Guide)

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DI-724U User’s Manual

D-Link Systems, Inc.

Using the Conﬁguration Menu

LAN is short for Local Area Network. This is considered your internal network. These are

the IP settings of the LAN interface for the DI-724U. These settings may be referred to

as Private settings. You may change the LAN IP address if needed. The LAN IP address

is private to your internal network and cannot be seen on the Internet.

LAN

Home > LAN

IP Address:

The IP address of your router on the local area network. Your

local area network settings are based on the address assigned

here. For example, 192.168.0.1.

Default Subnet

Mask:

The subnet mask of your router on the local area network.

DNS Relay:

When DNS Relay is enabled, the router plays the role of a

DNS server. DNS requests sent to the router are forwarded

to the ISP’s DNS server. You should disable DNS relay if you

implement a LAN-side DNS server as a virtual server.

Local Domain

Name:

This entry is optional. Enter a domain name for the local network.

The DHCP server will give this domain name to the computers

on the LAN. So, for example, if you enter mynetwork.net here,

and you have a PC with a name of chris, that PC will be known as

chris.mynetwork.net. Note, however, if the router’s WAN settings

specify Dynamic IP Address, and the ISP’s DHCP server assigns

a domain name to the router, that domain name will override any

name you enter here.

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Page 22 / 101

DI-724U User’s Manual

D-Link Systems, Inc.

Using the Conﬁguration Menu

DHCP

stands for

Dynamic Host Control Protocol

. The DI-724U has a built-in DHCP

server. The DHCP Server will automatically assign an IP address to the computers on

the LAN/private network. Be sure to set your computers to be DHCP clients by setting

their TCP/IP settings to “Obtain an IP Address Automatically.” When you turn your

computers on, they will automatically load the proper TCP/IP settings provided by the

DI-724U. The DHCP Server will automatically allocate an unused IP address from the

IP address pool to the requesting computer. You must specify the starting and ending

address of the IP address pool.

DHCP

Home > DHCP

DHCP Server:

Select

Enabled

Disabled

. The

default

setting is

Enabled

DHCP IP Address

Range:

These two values (from and to) deﬁne a range of addresses that

the DHCP Server uses when assigning addresses to computers

and devices on your Local Area Network.

Lease Time:

The amount of time that a computer may have an IP address

before it is required to renew the lease.

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Page 23 / 101

DI-724U User’s Manual

D-Link Systems, Inc.

Using the Conﬁguration Menu

DHCP Client:

This is a list of the computers or other devices for which you

have created Static DHCP entries. You can enable and disable

entries with the Enabled checkbox. A Static DHCP entry can

be changed by clicking the Edit icon, or deleted by clicking the

Delete icon. When you click the Edit icon, the item is highlighted,

and the “Static DHCP” section is activated for editing.

MAC Address:

To input the MAC address of your computer, enter it in manually

or connect to the router’s Web-Management interface from the

computer and click the Clone Your PC button.

Always Broadcast:

If all the computers on the LAN successfully obtain their IP addresses

from the router’s DHCP server as expected, this option can remain

disabled. However, if one of the computers on the LAN fails to obtain

an IP address from the router’s DHCP server, it may have an old

DHCP client that incorrectly turns off the broadcast ﬂag of DHCP

packets. Enabling this option will cause the router to always broad-

cast its responses to all clients, thereby working around the problem,

at the cost of increased broadcast trafﬁc on the LAN.

Computer Name:

You can assign a name for each computer that is given a static

IP address. This may help you keep track of which computers

are assigned this way.

IP Address:

The LAN address that you want to reserve.

Static DHCP:

In this section you can add reserved IP address to the Static

DHCP Client List below or edit existing entries. Each entry in

the table lets you reserve an IP addresses, and assign the

same IP address to the network device with the speciﬁed

MAC address any time it requests an IP address.

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Page 24 / 101

DI-724U User’s Manual

D-Link Systems, Inc.

Using the Conﬁguration Menu

Virtual Server

The DI-724U can be conﬁgured as a virtual server so that remote users accessing

Web or FTP services via the public IP address can be automatically redirected to local

servers in the LAN (Local Area Network).

The DI-724U ﬁrewall feature ﬁlters out unrecognized packets to protect your LAN

network so all computers networked with the DI-724U are invisible to the outside world.

If you wish, you can make some of the LAN computers accessible from the Internet by

enabling

Virtual Server.

Depending on the requested service, the DI-724U redirects

the external service request to the appropriate server within the LAN network.

The DI-724U is also capable of port-redirection meaning incoming trafﬁc to a particular

port may be redirected to a different port on the server computer.

Each virtual service that is created will be listed at the bottom of the screen in the

Virtual Servers List. There are pre-deﬁned virtual services already in the table. You may

use them by enabling them and assigning the server IP to use that particular virtual

service.

Advanced

Advanced > Virtual Server

The Advanced tab provides the following conﬁguration options: Virtual Server, Applications,

Port Fowarding, StreamEngine, Filters, Parental Control, Firewall, DMZ, Performance and

Schedules.

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DI-724U User’s Manual

D-Link Systems, Inc.

Using the Conﬁguration Menu

Click on this icon to edit the virtual service.

Click on this icon to delete the virtual service.

Virtual Server:

Here you can add a new Virtual Server List entry or edit an

existing one.

Name:

Assign a meaningful name to the virtual server, for example

Web Server.

Private IP:

The IP address of the system on your internal network that will

provide the virtual service, for example 192.168.0.50.

Protocol Type:

Select the protocol used by the service.

Private Port:

The port that will be used on your internal network.

Public Port:

The port that will be accessed from the Internet.

Schedule:

Select a schedule for when the service will be enabled. If you do

not see the schedule you need in the list of schedules, go to the

Advanced

Schedules

screen and create a new schedule.

Example #1:

If you have a Web server that you wanted Internet users to

access at all times, you would need to enable it. Web (HTTP)

server is on LAN (Local Area Network) computer 192.168.0.25.

HTTP uses port 80, TCP

Name: Web Server

Private IP: 192.168.0.25

Protocol Type: TCP

Private Port: 80

Public Port: 80

Schedule: always

Firewall Rule:

Select a ﬁrewall rule that controls access as needed for this

virtual server. If you do not see the ﬁrewall rule you need in

the list of ﬁrewall rules, go to the

Advanced

Firewalls

page

and create a new ﬁrewall rule.

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