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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.
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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.
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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.
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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
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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.
19216811.live