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Wireless-N ADSL2+ Modem Router DGN2000 Reference Manual
Advanced Configuration
5-7
v1.0, July 2008
The router delivers the following settings to any LAN device that requests DHCP:
•
An IP address from the range you have defined
•
Subnet mask
•
Gateway IP address is the router’s LAN IP address
•
Primary DNS server, if you entered a primary DNS address in the Basic Settings screen;
otherwise, the router’s LAN IP address
•
Secondary DNS server, if you entered a secondary DNS address in the Basic Settings screen
•
WINS server, short for
Windows Internet Naming Service Server,
determines the IP address
associated with a particular Windows computer. A WINS server records and reports a list of
names and IP address of Windows PCs on its local network. If you connect to a remote
network that contains a WINS server, enter the server’s IP address here. This allows your PCs
to browse the network using the Network Neighborhood feature of Windows.
How to Configure Reserved IP Addresses
When you specify a reserved IP address for a computer on the LAN, that computer will always
receives the same IP address each time it access the router’s DHCP server. Reserved IP addresses
should be assigned to servers that require permanent IP settings.
To reserve an IP address:
1.
In the LAN IP Setup screen, click the
Add
button.
2.
In the
IP Address
field, type the IP address to assign to the computer or server. Choose an
IP address from the router’s LAN subnet, such as 192.168.0.x.
3.
Type the MAC address of the computer or server.
4.
Click
Apply
to enter the reserved address into the table.
Tip:
If the computer is already present on your network, you can copy its MAC
address from the Attached Devices screen and paste it here.
Note:
The reserved address will not be assigned until the next time the computer
contacts the router’s DHCP server. Reboot the computer or access its IP
configuration and force a DHCP release and renew.
Page 92 / 126
Wireless-N ADSL2+ Modem Router DGN2000 Reference Manual
5-8
Advanced Configuration
v1.0, July 2008
To edit or delete a reserved address entry:
1.
Click the button next to the reserved address that you want to edit or delete.
2.
Click
Edit
or
Delete
.
Configuring LAN TCP/IP Settings
1.
Log in to the router at its default LAN address of
with its default user name
of
admin
and default password of
password
, or using whatever user name, password, and
LAN address you have chosen for the router.
2.
In the main menu, under Advanced, click
LAN IP Setup
to display the following screen.
3.
Enter the TCP/IP, DHCP, or reserved IP settings.
4.
Click
Apply
to save your changes.
Figure 5-3
Page 93 / 126
Wireless-N ADSL2+ Modem Router DGN2000 Reference Manual
Advanced Configuration
5-9
v1.0, July 2008
Configuring Dynamic DNS
If your network has a permanently assigned IP address, you can register a domain name and have
that name linked with your IP address by public Domain Name Servers (DNS). However, if your
Internet account uses a dynamically assigned IP address, you will not know in advance what your
IP address will be, and the address can change frequently. In this case, you can use a commercial
Dynamic DNS service that will allow you to register your domain to their IP address, and will
forward traffic directed at your domain to your frequently changing IP address.
The router contains a client that can connect to a Dynamic DNS service provider. To use this
feature, you must select a service provider and obtain an account with them. After you have
configured your account information in the router, whenever your ISP-assigned IP address
changes, your router automatically contacts your Dynamic DNS service provider, logs in to your
account, and registers your new IP address.
How to Configure Dynamic DNS
1.
Log in to the modem router at its default LAN address of
with its default
user name of
admin
and default password of
password
, or using whatever user name,
password, and LAN address you have chosen for the modem router.
2.
In the main menu, under Advanced, select
Dynamic DNS
to display the following screen.
3.
Access the website of one of the Dynamic DNS service providers whose names appear in the
Service Provider
drop-down list, and register for an account. For example, for dyndns.org, go
to www.dyndns.org.
4.
Select the
Use a dynamic DNS Service
check box.
Figure 5-4
Page 94 / 126
Wireless-N ADSL2+ Modem Router DGN2000 Reference Manual
5-10
Advanced Configuration
v1.0, July 2008
5.
Select the name of your Dynamic DNS service provider.
6.
Type the host name that your Dynamic DNS service provider gave you. The Dynamic DNS
service provider might call this the domain name. If your URL is myName.dyndns.org, then
your host name is myName.
7.
Type the user name for your Dynamic DNS account.
8.
Type the password (or key) for your Dynamic DNS account.
9.
If your Dynamic DNS provider allows the use of wildcards in resolving your URL, you can
select the
Use Wildcards
check box to activate this feature. For example, the wildcard feature
causes *.yourhost.dyndns.org to be aliased to the same IP address as yourhost.dyndns.org.
10.
Click
Apply
to save your configuration.
Using Static Routes
Static routes provide additional routing information to your router. Under normal circumstances,
the router has adequate routing information after it has been configured for Internet access, and
you do not need to configure additional static routes. You must configure static routes only for
unusual cases such as multiple routers or multiple IP subnets located on your network.
Static Route Example
As an example of when a static route is needed, consider the following case:
•
Your primary Internet access is through a cable modem to an ISP.
•
You have an ISDN router on your home network for connecting to the company where you are
employed. This router’s address on your LAN is 192.168.0.100.
•
Your company’s network address is 134.177.0.0.
When you first configured your router, two implicit static routes were created. A default route was
created with your ISP as the modem router, and a second static route was created to your local
network for all 192.168.0.x addresses. With this configuration, if you attempt to access a device on
Note:
If your ISP assigns a private WAN IP address such as 192.168.x.x or 10.x.x.x, the
Dynamic DNS service will not work because private addresses will not be routed
on the Internet.
Page 95 / 126
Wireless-N ADSL2+ Modem Router DGN2000 Reference Manual
Advanced Configuration
5-11
v1.0, July 2008
the 134.177.0.0 network, your router forwards your request to the ISP. The ISP forwards your
request to the company where you are employed, and the request is likely to be denied by the
company’s firewall.
In this case you must define a static route, telling your router that 134.177.0.0 should be accessed
through the ISDN router at 192.168.0.100. The static route setup would look like
Figure 5-6
.
In this example:
•
The
Destination IP Address
and
IP Subnet Mask
fields specify that this static route applies
to all 134.177.x.x addresses.
•
The
Gateway IP Address
field specifies that all traffic for these addresses should be
forwarded to the ISDN router at 192.168.0.100.
•
The value in the
Metric
field represents the number of routers between your network and the
destination. This is a direct connection, so it can be set to the minimum value of 2.
•
The
Private
check box is selected only as a precautionary security measure in case RIP is
activated.
How to Configure Static Routes
1.
Log in to the modem router at its default LAN address of
with its default
user name of
admin
and default password of
password
, or using whatever user name,
password, and LAN address you have chosen for the modem router.
2.
In the main menu, under Advanced, select
Static Routes
to display the Static Routes table.
Figure 5-5

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