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Page 101 / 268 Scroll up to view Page 96 - 100
Reference Manual for the Model Wireless ADSL Firewall Router DG834G
Advanced Configuration
7-9
202-10006-05, June 2005
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 will cause *.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 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 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 the
134.177.0.0 network, your router will forward your request to the ISP. The ISP forwards your
request to the company where you are employed, and the request will likely be denied by the
company’s firewall.
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 102 / 268
Reference Manual for the Model Wireless ADSL Firewall Router DG834G
7-10
Advanced Configuration
202-10006-05, June 2005
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 would look like
Figure 7-6
.
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 Router IP Address fields specifies that all traffic for these addresses should be forwarded
to the ISDN router at 192.168.0.100.
•
A Metric value of 1 will work since the ISDN router is on the LAN.
This represents the number of routers between your network and the destination. This is a
direct connection so it is set to 1.
•
Private is selected only as a precautionary security measure in case RIP is activated.
How to Configure Static Routes
1.
Log in to the router at its default LAN address of
with its default User Name
of
admin
, default password of
password
, or using whatever User Name, Password and LAN
address you have chosen for the router.
2.
From the Main Menu of the browser interface, under Advanced, click Static Routes to view
the Static Routes menu, shown in
Figure 7-5
.
Figure 7-5:
Static Routes Table
Page 103 / 268
Reference Manual for the Model Wireless ADSL Firewall Router DG834G
Advanced Configuration
7-11
202-10006-05, June 2005
3.
To add or edit a Static Route:
a.
Click the
Edit
button to open the Edit Menu, shown in
Figure 7-6
.
Figure 7-6:
Static Route Entry and Edit Menu
b.
Type a route name for this static route in the Route Name box under the table.
This is for identification purpose only.
c.
Select
Private
if you want to limit access to the LAN only.
The static route will not be reported in RIP.
d.
Select
Active
to make this route effective.
e.
Type the Destination IP Address of the final destination.
f.
Type the IP Subnet Mask for this destination.
If the destination is a single host, type 255.255.255.255.
g.
Type the Gateway IP Address, which must be a router on the same LAN segment as the
router.
h.
Type a number between 1 and 15 as the Metric value.
This represents the number of routers between your network and the destination. Usually,
a setting of 2 or 3 works, but if this is a direct connection, set it to 1.
4.
Click
Apply
to have the static route entered into the table.
Page 104 / 268
Reference Manual for the Model Wireless ADSL Firewall Router DG834G
7-12
Advanced Configuration
202-10006-05, June 2005
Universal Plug and Play (UPnP)
Universal Plug and Play (UPnP) helps devices, such as Internet appliances and computers, access
the network and connect to other devices as needed. UPnP devices can automatically discover the
services from other registered UPnP devices on the network.
1.
Click UPnP on the main menu to invoke the UPnP menu:
Figure 7-7:
Universal Plug and Play menu
2.
Fill out the UPnP screen:
•
Turn UPnP On
: UPnP can be enabled or disabled for automatic device configuration. The
default setting for UPnP is enabled. If disabled, the Router will not allow any device to
automatically control the resources, such as port forwarding (mapping), of the Router.
•
Advertisement Period
: The Advertisement Period is how often the Router will advertise
(broadcast) its UPnP information. This value can range from 1 to 1440 minutes. The
default period is for 30 minutes. Shorter durations will ensure that control points have
current device status at the expense of additional network traffic. Longer durations may
compromise the freshness of the device status but can significantly reduce network traffic.
•
Advertisement Time To Live
: The time to live for the advertisement is measured in hops
(steps) for each UPnP packet sent. A hop is the number of steps allowed to propagate for
each UPnP advertisement before it disappears. The number of hops can range from 1 to
255. The default value for the advertisement time to live is 4 hops, which should be fine
for most home networks. If you notice that some devices are not being updated or reached
correctly, then it may be necessary to increase this value a little.
Page 105 / 268
Reference Manual for the Model Wireless ADSL Firewall Router DG834G
Advanced Configuration
7-13
202-10006-05, June 2005
•
UPnP Portmap Table
: The UPnP Portmap Table displays the IP address of each UPnP
device that is currently accessing the Router and which ports (Internal and External) that
device has opened. The UPnP Portmap Table also displays what type of port is opened and
if that port is still active for each IP address.
3.
To save, cancel or refresh the table:
a.
Click Apply to save the new settings to the Router.
b.
Click Cancel to disregard any unsaved changes.
c.
Click Refresh to update the portmap table and to show the active ports that are currently
opened by UPnP devices.

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