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Advanced Settings
71
N150 2-Port Wireless Router WNR612v3
4.
In the Service Name field, enter a descriptive name.
5.
In the Protocol list, select the protocol. If you are unsure, select
TCP/UDP
.
6.
In the Starting Port field, enter the beginning port number.
•
If the application uses a single port, enter the same port number in the Ending Port
field.
•
If the application uses a range of ports, enter the ending port number of the range in
the Ending Port field.
7.
In the Server IP Address field, enter the IP address of your local computer that will provide
this service.
8.
Click
Apply
. The service appears in the list in the Port Forwarding/Port Triggering screen.
Edit or Delete a Port Forwarding Entry
To edit or delete a port forwarding entry:
1.
In the table, select the radio button next to the service name.
2.
Click
Edit Service
or
Delete Service
.
Application Example: Making a Local Web Server Public
If you host a web server on your local network, you can use port forwarding to allow web
requests from anyone on the Internet to reach your web server.
To make a local web server public:
1.
Assign your web server either a fixed IP address or a dynamic IP address using DHCP
address reservation. In this example, your router always gives your web server an IP
address of 192.168.1.33.
2.
In the Port Forwarding screen, configure the router to forward the HTTP service to the local
address of your web server at
192.168.1.33
. HTTP (port 80) is the standard protocol for web
servers.
3.
(Optional) Register a host name with a Dynamic DNS service, and configure your router to
use the name as described in
Dynamic DNS
on page
73. To access your web server from
the Internet, a remote user has to know the IP address that your ISP assigned. However, if
you use a Dynamic DNS service, the remote user can reach your server by a user-friendly
Internet name, such as mynetgear.dyndns.org.
Set Up Port Triggering
Port triggering is a dynamic extension of port forwarding that is useful in these cases:
•
More than one local computer needs port forwarding for the same application (but not
simultaneously).
•
An application needs to open incoming ports that are different from the outgoing port.
When port triggering is enabled, the router monitors outbound traffic looking for a specified
outbound “trigger” port. When the router detects outbound traffic on that port, it remembers
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Advanced Settings
72
N150 2-Port Wireless Router WNR612v3
the IP address of the local computer that sent the data. The router then temporarily opens the
specified incoming port or ports, and forwards incoming traffic on the triggered ports to the
triggering computer.
Port forwarding creates a static mapping of a port number or range to a single local computer.
Port triggering can dynamically open ports to any computer that needs them and can close
the ports when they are no longer needed.
Note:
If you use applications such as multiplayer gaming, peer-to-peer
connections, real-time communications such as instant messaging,
or remote assistance (a feature in Windows XP), you should also
enable Universal Plug and Play (UPnP) according to the instructions
in
Universal Plug and Play
on page
77.
To set up port triggering, you need to know which inbound ports the application needs and the
number of the outbound port that will trigger the opening of the inbound ports. You can
usually get this information by contacting the publisher of the application or user groups or
newsgroups.
To set up port triggering:
1.
Select
Advanced > Advanced Setup > Port Forwarding/Port Triggering
.
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.
Page 73 / 99
Advanced Settings
73
N150 2-Port Wireless Router WNR612v3
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 list, 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 does 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
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
.
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Advanced Settings
74
N150 2-Port Wireless Router WNR612v3
To set up Dynamic DNS:
1.
On the Advanced tab, select
Advanced Setup > Dynamic DNS
to display the following
screen:
2.
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
.
3.
Select the
Use a Dynamic DNS Service
check box.
4.
Select the name of your Dynamic DNS service provider.
5.
Type the host name (or domain name) that your Dynamic DNS service provider gave you.
6.
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.
7.
Type the password (or key) for your Dynamic DNS account.
8.
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.
9.
Click
Apply
to save your configuration.
Static Routes
Static routes provide additional routing information to your router. Typically, you do not need
to add static routes. You have to configure static routes only for unusual cases such as
multiple routers or multiple IP subnets 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 192.168.1.100.
•
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
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Advanced Settings
75
N150 2-Port Wireless Router WNR612v3
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.
To set up a static route:
1.
Select
Advanced > Advanced Setup > Static Routes
2.
Click
Add
to display the following screen:
3.
In the Route Name field, type a name for this static route (for identification purposes only.)
4.
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.
5.
Select the
Active
check box to make this route effective.
6.
Type the destination IP address of the final destination.
7.
Type the IP subnet mask for this destination. If the destination is a single host, type
255.255.255.255
.
8.
Type the gateway IP address, which has to be a router on the same LAN segment as the
N150 2-Port Wireless Router.
9.
Type a number from 1 through 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.
10.
Click
Apply
to add the static route.

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