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Page 101 / 129 Scroll up to view Page 96 - 100
Advanced Settings
101
N600 Wireless Dual Band Gigabit Router Premium Edition WNDR3800
2.
Select the
Port Triggering
radio button to display the port triggering information.
3.
Clear the
Disable Port Triggering
check box if it is selected.
Note:
If the Disable Port Triggering check box is selected after you configure
port triggering, port triggering is disabled. However, any port triggering
configuration information you added to the router is retained even though it is
not used.
4.
In the Port Triggering Timeout field, enter a value up to 9999 minutes.
5.
This value controls the inactivity timer for the designated inbound ports. The inbound ports
close when the inactivity time expires. This is required because the router cannot be sure
when the application has terminated.
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Advanced Settings
102
N600 Wireless Dual Band Gigabit Router Premium Edition WNDR3800
6.
Click
Add Service
to display the following screen:
7.
In the Service Name field, type a descriptive service name.
8.
In the Service User field, select
Any
(the default) to allow this service to be used by any
computer on the Internet. Otherwise, select
Single address
, and enter the IP address of
one computer to restrict the service to a particular computer.
9.
Select the service type, either
TCP
or
UDP
or both (
TCP/UDP
). If you are not sure, select
TCP/UDP.
10.
In the Triggering Port field, enter the number of the outbound traffic port that will cause the
inbound ports to be opened.
11.
Enter the inbound connection port information in the Connection Type, Starting Port, and
Ending Port fields.
12.
Click
Apply
. The service appears in the Port Triggering Portmap table.
Dynamic DNS
If your Internet service provider (ISP) gave you 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 do 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. This type
of service lets you register your domain to their IP address and forwards traffic directed at
your domain to your frequently changing IP address.
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 are not routed on the Internet.
Your router contains a client that can connect to the Dynamic DNS service provided by
DynDNS.org. First visit their website at
and obtain an account and
Page 103 / 129
Advanced Settings
103
N600 Wireless Dual Band Gigabit Router Premium Edition WNDR3800
host name that you configure in the router. Then, whenever your ISP-assigned IP address
changes, your router automatically contacts the Dynamic DNS service provider, logs in to
your account, and registers your new IP address. If your host name is hostname, for
example, you can reach your router at
.
On the Advanced tab, select
Advanced Setup > Dynamic DNS
to display the following
screen:
Figure 10. Forward traffic to a changing IP address
To set up Dynamic DNS:
1.
Register for an account with one of the Dynamic DNS service providers whose names
appear in the Service Provider list. For example, for DynDNS.org, select
www.dyndns.org
.
2.
Select the
Use a Dynamic DNS Service
check box.
3.
Select the name of your Dynamic DNS service provider.
4.
Type the host name (or domain name) that your Dynamic DNS service provider gave you.
5.
Type the user name for your Dynamic DNS account. This is the name that you use to log in
to your account, not your host name.
6.
Type the password (or key) for your Dynamic DNS account.
7.
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.
8.
Click
Apply
to save your configuration.
Page 104 / 129
Advanced Settings
104
N600 Wireless Dual Band Gigabit Router Premium Edition WNDR3800
Static Routes
Static routes provide additional routing information to your router. Under usual
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 have to
configure static routes only for unusual cases such as multiple routers or multiple IP subnets
located on your network.
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
1
92.168.1.100.
•
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 gateway, and a second static route was created to your
local network for all 192.168.1.x addresses. With this configuration, if you attempt to access a
device on 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 have to define a static route, telling your router that 134.177.0.0 should be
accessed through the ISDN router at 192.168.1.100. 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 192.168.1.100.
•
A metric value of 1 will work since the ISDN router is on the LAN.
•
Private is selected only as a precautionary security measure in case RIP is activated.
Page 105 / 129
Advanced Settings
105
N600 Wireless Dual Band Gigabit Router Premium Edition WNDR3800
To set up a static route:
1.
Select
Advanced > Advanced Setup > Static Routes
, and click
Add
to display the
following screen:
2.
In the Route Name field, type a
name
for this static route (for identification purposes only.)
3.
Select the
Private
check box if you want to limit access to the LAN only. If Private is
selected, the static route is not reported in RIP.
4.
Select the
Active
check box to make this route effective.
5.
Type the destination IP address of the final destination.
6.
Type the IP subnet mask for this destination. If the destination is a single host, type
255.255.255.255
.
7.
Type the gateway IP address, which has to be a router on the same LAN segment as the
WNDR3800 router.
8.
Type a number between 1 and 15 as the metric value.
This value 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.
9.
Click
Apply
to add the static route.

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