Please check

www.sitecom.com

for up to date drivers & utilities, manuals and support

21

6.2 DHCP Settings

You can configure your network and DSL device to use the Dynamic Host Configuration

Protocol (DHCP). This page provides DHCP instructions for implementing it on your network

by selecting the role of DHCP protocol that this device wants to play. There are two different

DHCP roles that this device can act as: DHCP Server and DHCP Relay. When acting as DHCP

server, you can setup the server parameters at the

DHCP Server

page; while acting as DHCP

Relay, you can setup the relay at the

DHCP Relay

page.

Sitecom ADSL2+ Modem DC-227

22

6.2.1 DHCP Server

By default, the device is configured as a DHCP server, with a predefined IP address pool of

192.168.0.100 through 192.168.0.200 (subnet mask 255.255.255.0).

Field

Description

IP Pool Range

Specify the lowest and highest addresses in the pool.

Max Lease Time

The Lease Time is the amount of time that a network user is allowed to

maintain a network connection to the device using the current dynamic

IP address. At the end of the Lease Time, the lease is either renewed or

a new IP is issued by the DHCP server. The amount of time is in units of

seconds. The default value is 86400 seconds (1 day). The value –1

stands for the infinite lease.

Domain Name

A user-friendly name that refers to the group of hosts (subnet) that will

be assigned addresses from this pool.

Apply Changes

Set new DHCP server configuration. New parameters will take effect after saving into

flash memory and rebooting the system.

Please check

www.sitecom.com

for up to date drivers & utilities, manuals and support

23

6.2.2 DHCP Relay Configuration

Some ISPs perform the DHCP server function for their customers’ home/small office network.

In this case, you can configure this device to act as a DHCP relay agent. When a host on your

network requests Internet access, the device contacts your ISP to obtain the IP configuration,

and then forward that information to the host.

Apply Changes

Click to save the setting to the configuration. New parameters will take effect after

saving into flash memory and rebooting the system.

Field

Description

DHCP Server

Address

Specify the IP address of your ISP’s DHCP server. Requests for IP

information from your LAN will be passed to the default gateway, which

should route the request appropriately.

Sitecom ADSL2+ Modem DC-227

24

6.3 DDNS Settings

Each time your device connects to the Internet, your ISP assigns a different IP address to

your device. In order for you or other users to access your device from the WAN-side, you

need to manually track the IP that is currently used. The Dynamic DNS feature allow you to

register your device with a DNS server and access your device each time using the same host

name. The

Dynamic DNS

page allows you to enable/disable the Dynamic DNS feature.

Field

Description

Enable

Check this item to enable this registration account for the DNS server.

DDNS provider

There are two DDNS providers to be selected in order to register your

device with: DynDNS and TZO. A charge may occurs depends on the

service you select.

Hostname

Domain name to be registered with the DDNS server.

Interface

This field defaults to your device’s WAN interface over which your

device will be accessed.

Username

User-name assigned by the DDNS service provider.

Password

Password assigned by the DDNS service provider.

Add

Please check

www.sitecom.com

for up to date drivers & utilities, manuals and support

25

Click Add to add this registration into the configuration.

Remove

Select an existing DDNS registration by clicking the radio button at the

Select

column of

the

Dynamic DNS Table

. Click

Remove

button to remove the selected registration

from the configuration.

Apply Changes

Set new DNS relay configuration. New parameters will take effect after save into flash

memory and reboot the system.

Undo

Discard your changes.