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D-Link DSL-2542B User Manual

26

LAN Setup

To access the

LAN Setup

window, click the

LAN Setup

button in the

Setup

directory.

You can configure the LAN IP address to suit your preference. Many users

will find it convenient to use the default settings together with DHCP

service to manage the IP settings for their private network. The IP address

of the Router is the base address used for DHCP. In order to use the

Router for DHCP on your LAN, the IP address pool used for DHCP must

be compatible with the IP address of the Router. The IP addresses

available in the DHCP IP address pool will change automatically if you

change the IP address of the Router. See the next section for information

on DHCP setup.

To change the LAN Router IP Address or Subnet Mask, type in the

desired values in the Router Settings section and click the

Apply

Settings

button. Your web browser should automatically be redirected to

the new IP address. You will be asked to login again to the Router’s web

manager.

The DHCP server is enabled by default for the Router’s Ethernet LAN

interface. DHCP service will supply IP settings to workstations configured

to automatically obtain IP settings that are connected to the Router though

the Ethernet port. When the Router is used for DHCP it becomes the

default gateway for DHCP client connected to it. Keep in mind that if you

change the IP address of the Router the range of IP addresses in the pool

used for DHCP on the LAN will also be changed. The IP address pool can

be up to 253 IP addresses.

There are two options for DHCP service:

•

You can use the Router as a DHCP server for your LAN.

•

You can disable DHCP service and manually configure IP settings

for workstations.

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27

You may also configure DNS settings when using the Router in DHCP mode (

Advanced

>

DNS Setup

). When “Obtain DNS server address

automatically“ is clicked under DNS Server Configuration on the

DNS Setup

window, the Router will automatically relay DNS settings to properly

configured DHCP clients. To manually enter DNS IP addresses, click the “Use the following DNS server addresses“ radio button

and type in a

Preferred DNS Server and Alternate DNS Server in the fields provided. The manually configured DNS settings will be supplied to clients that are

configured to request them from the Router.

Follow the instructions below according to which of the above DHCP options you want to use. When you have configured DHCP as you want, click

the

Apply Settings

button to commit the new settings.

Use the Router for DHCP

To use the built-in DHCP server, tick the Enable DHCP Server check box in the DHCP Server Settings (Optional) section if it is not already selected.

The IP address pool settings can be adjusted. The DHCP IP Address Range starts with the lowest available IP address (default = 192.168.1.2). If

you change the IP address of the Router this will change automatically to be 1 more that the IP address of the Router. The DHCP IP Address Range

ends with the highest IP address number in the pool. Type in the DHCP Lease Time in the entry field provided. This is the amount of time in hours

that a workstation is allowed to reserve an IP address in the pool if the workstation is disconnected from the network or powered off.

Disable the DHCP Server

To disable DHCP, deselect the Enable DHCP Server check box in the DHCP Server Settings (Optional) section and click the

Apply Settings

button.

Choosing this option will gray out most of the setting options on this window and require that workstations on the local network be configured

manually or use another DHCP server to obtain IP settings.

If you configure IP settings manually, make sure to use IP addresses in the subnet of the Router. You will need to use the Router’s IP address as the

Default Gateway for the workstation in order to provide Internet access.

Add Static DHCP

To add a static DHCP entry to the Static DHCP List, tick the Enable check box in the Add Static DHCP (Optional) section, type in an IP Address,

either click the

Copy Your PC’s MAC Address

button or manually enter a MAC Address, enter a Computer Name if desired, and click the

Save

button. Click

Clear

to reset the values in this section. To delete an entry from the Static DHCP List, tick the corresponding check box and then click

the

Remove Selected

button. To modify a Static DHCP List entry, click the corresponding Edit hyperlink and then enter the information in the

appropriate fields in the Add Static DHCP (Optional) section.

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28

Time and Date

To access the

Time and Date

window, click the

Time and Date

button in the

Setup

directory.

The Router provides a number of options to maintain current date and

time including NTP.

To configure system time on the Router, select the method used to

maintain time. The options available include Network Time Protocol

(default), using your computer’s system clock (deselect the Automatically

synchronize with Internet time servers check box and then click the

Copy

Your Computer’s Time Settings

button), or set the time and date

manually (deselect the Automatically synchronize with Internet time

servers check box and make the desired changes).

If you opt to use NTP, you must use the drop-down menu to select the

NTP server URL in the First NTP Time Server field. You may also want to

choose a Second NTP Time Server using the drop-down menu.

The Router also allows you to set the time zone you are in by using the

Time Zone drop-down menu. In addition, you can configure Daylight

Saving by ticking the Enable Daylight Saving check box and then using

the drop-down menus to configure the desired Daylight Saving Offset and

Daylight Saving starting and ending dates.

When you are finished, click the

Apply Settings

button to set the system

time and date information.

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29

Parental Control

To access the

Parental Control

window, click the

Parental Control

button in the

Setup

directory.

Use this window to deny access to specified websites and to set Internet

access time periods.

URL or Uniform Resource Locator is a specially formatted text string that

uniquely defines an Internet website. This window will allow users to block

computers on the LAN from accessing certain URLs. This may be

accomplished by simply entering the URL to be blocked in the Website

field.

To configure this window for URL blocking, enter the website’s address

into the Website

field, use the radio buttons to click the desired Day(s),

either All Week or Select Day(s) (in which case you must tick the

checkboxes for the desired individual days of the week), select the

desired Start Time and End Time or tick the All Day – 24 hrs checkbox,

and then click the

Block Website

button. Configured URL blocking

entries are displayed in the table in the middle of the window. To remove a

Blocked URL entry in the table, tick the Remove check box and then click

the

Remove Selected

button. To modify a table entry, click the

corresponding Edit hyperlink, make the desired changes, and then click

the

Block Website

button.

This window also enables you to determine when Internet access is

granted by using the settings in the Internet Access Time Restrictions

section of this window. Configure Time and days of the week and then use

the drop-down menu to toggle the Allow/Deny setting for each time period.

Clicking the

Apply Settings

button will allow your setting to take effect.

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30

Advanced

This chapter include the more advanced features used for network management and security.

Port Forwarding

To access the

Port Forwarding

window, click the

Port Forwarding

button in the

Advanced

directory.

Port Forwarding is used to allow Internet users access to LAN services.

Enter an IP address in the Private IP field, select a Protocol Type from the

drop-down menu, enter a range of ports in the Public Start Port and Public

End Port fields, and then click the

Add/Apply Settings

button. Finally,

click the

Reboot

button on the left panel to let your changes take effect.