Netgear Dgnd3700v2 N600 Wireless Dual Band Gigabit Adsl2 Plus Modem Router User Manual

							Advanced Settings 111
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5. 
In the corresponding Send to LAN Server field, enter the last digit of t\
he IP address of your 
local computer that will provide this service. 
6.  Click  Apply . 
 The service appears in the list in the screen.
Add a Custom Service
To define a service, game, or application that does not appear in the Ser\
vice Name list, you 
have to first determine which port number or range of numbers is used by\
 the application. 
You can usually determine this information by contacting the publisher of\
 the application or  user groups or newsgroups. 
To add a custom service:
1.  Select  Advanced > 
 Advanced Setup > Port Forwarding/Port Triggering .
2.  Select  Port Forwarding  as the service type.
3.  Click the  Add Custom Service button to display the following screen:
4. In the Name field, enter a descriptive name. 
5.  In the 
Type list, select the protocol. If you are unsure, select  TCP/UDP.
6.  In the Start Port field, enter the beginning port number
 . 
• If the application uses a single port, enter the same port number in the\
 End Port field.
• If the application uses a range of ports, enter the ending port number o\
f the range in 
the End Port field.
7.  Click  Apply . 
 The service appears in the list in the Port Forwarding/Port Triggering screen. 
						

							Advanced Settings 
112 N600 Wireless Dual Band Gigabit ADSL2+ Modem Router DGND3700v2 
Edit or Delete a Port Forwarding Entry
To edit or delete a port forwarding entry:
1. Select Advanced > Advanced Setup > Port Forwarding/Port Triggering.
2. In the table, select the radio button next to the service name.
3. 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 wireless modem router will always give your 
web server an IP address of 192.168.1.33. 
2. In the Port Forwarding/Port Triggering screen, configure the wireless modem 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 wireless 
modem router to use the name as described in 
Dynamic DNS on page 11 4. To access your 
web server from the Internet, a remote user has to know the IP address that has been 
assigned by your ISP. 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 wireless modem router monitors outbound traffic looking 
for a specified outbound “trigger” port. When the wireless modem router detects outbound 
traffic on that port, it remembers the IP address of the local computer that sent the data. The 
wireless modem router then temporarily opens the specified incoming port or ports, and 
forwards incoming traffic on the triggered ports to the triggering computer. 
While 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. 
						

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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
  11 9.
To set up port triggering, you need to know which inbound ports the appli\
cation needs. Also,  you need to know the number of the outbound port that will trigger the o\
pening of the inbound 
ports. 

You can usually determine 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 T
 riggering 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 triggeri\
ng 
configuration information you added to the wireless modem router is 
retained even though it is not used.
4.  In the Port 
 Triggering Timeout field, enter a value up to 9999 minutes. 
This value controls the inactivity timer for the designated inbound port\
s. The inbound  ports close when the inactivity time expires. 
 This is required because the wireless modem 
router cannot be sure when the application has terminated. 
						

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5. 
Click  Add Service to display the following screen: 
6. In the Service Name field, type a descriptive service name. 
7.  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

. 
8.  Select the service type, either  TCP or UDP or both ( TCP/UDP). If you are not sure, select 
TCP/UDP
 .
9.  In the 
Triggering Port field, enter the number of the outbound traffic port that will cause the 
inbound ports to be opened. 
10.  Enter the inbound connection port information in the Service 
 Type, Starting Port, and Ending 
Port fields.
11.  Click  Apply . 
 The service appears in the Port Triggering Portmap table. 
Dynamic DNS
If your Internet service provider (ISP) gave you a permanently assigne\
d 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 th\
e 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 forward\
s 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 th\
e Internet. 
						

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Your wireless modem router contains a client that can connect to the Dyna\
mic DNS service 
provided by DynDNS.org. First visit their website at http://www.dyndns.org  and obtain an 
account and host name that you configure in the wireless modem router. Then, whenever 
your ISP-assigned IP address changes, your wireless modem router automat\
ically 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 \
wireless modem 
router at  http://hostname.dyndns.org .
On the Advanced tab, select  Advanced Setup > Dynamic DNS to display the following 
screen:
Figure 12. 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 wh\
ose 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.  T
ype the host name (or domain name) that your Dynamic DNS service provi\
der gave you.
5. T
ype 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.  T
ype the password (or key) for your Dynamic DNS account. 
7.  Click  Apply to save your configuration. 
						

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116 N600 Wireless Dual Band Gigabit ADSL2+ Modem Router DGND3700v2 
Static Routes
Static routes provide additional routing information to your wireless modem router. Under 
usual circumstances, the wireless modem 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 wireless 
modem 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 wireless modem router on your home network for connecting to the 
company where you are employed. This wireless modem 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 wireless modem 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 wireless modem 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 wireless modem router that 
134.177.0.0 should be accessed through the ISDN wireless modem 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 wireless modem router at 192.168.1.100. 
•A metric value of 1 will work since the ISDN wireless modem router is on the LAN. 
•Private is selected only as a precautionary security measure in case RIP is activated. 
						

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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 ef
 fective. 
5.  T
ype the IP address of the final destination. 
6. T
ype the IP subnet mask for this destination. If the destination is a sin\
gle host, type 
255.255.255.255. 
7.  T
ype the gateway IP address, which has to be a  wireless modem router on the same LAN 
segment as the N600 Modem Router. 
8.  T
ype a number between 1 and 15 as the metric value. 
This value represents the number of wireless modem 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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N600 Wireless Dual Band Gigabit ADSL2+ Modem Router DGND3700v2 
Remote Management
The remote management feature lets you upgrade or check the status of yo\
ur N600 Modem 
Router over the Internet.
To set up remote management:
1. 
Select  Advanced > 
 Advanced Setup > Remote Management. 
Note:Be sure to change the wireless modem router’s default login password \
to a very secure password. The ideal password should contain no 
dictionary words from any language and contain uppercase and 
lowercase letters, numbers, and symbols. It can be up to 30 
characters.
2.  Select the  T
 urn Remote Management On check box.
3.  Under 
Allow Remote Access By, specify the external IP addresses to be allowed to access 
the  wireless modem router’s  remote management.
Note: For enhanced security, restrict access to as few external IP addresses 
as practical.
• T
o allow access from a single IP address on the Internet, select Only This 
Computer . Enter the IP address that will be allowed access. 
• T
o allow access from a range of IP addresses on the Internet, select IP Address 
Range. Enter a beginning and ending IP address to define the allowed range. 
• T
o allow access from any IP address on the Internet, select Everyone. 
4.  Specify the port number for accessing the management interface. 
						

							Advanced Settings 
119  N600 Wireless Dual Band Gigabit ADSL2+ Modem Router DGND3700v2
Normal web browser access uses the standard HTTP service port 80. For greater 
security, enter a custom port number for the remote web management interface. Choose 
a number between 1024 and 65535, but do not use the number of any common service 
port. The default is 8080, which is a common alternate for HTTP.
5. Click Apply to have your changes take effect.
6. When accessing your wireless modem router from the Internet, type your wireless modem 
router’s WAN IP address into your browser’s address or location field followed by a colon (:) 
and the custom port number. For example, if your external address is 134.177.0.123 and 
you use port number 8080, enter http://134.177.0.123:8080 in your browser.
USB Settings
For added security, the wireless modem router can be set up to share only approved USB 
devices. See 
Specify Approved USB Devices on page 68 for the procedure.
Universal Plug and Play
Universal Plug and Play (UPnP) helps devices, such as Internet appliances and computers, 
to 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.
Note:If you use applications such as multiplayer gaming, peer-to-peer 
connections, or real-time communications such as instant messaging 
or remote assistance (a feature in Windows XP), you should enable 
UPnP. 
						

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N600 Wireless Dual Band Gigabit ADSL2+ Modem Router DGND3700v2 
To turn on Universal Plug and Play:
1. 
Select  Advanced > 
 Advanced Setup > UPnP. The UPnP screen displays. 
2. The available settings and information in this screen are:
Turn UPnP On. UPnP can be enabled or disabled for automatic device configuration. 
The default setting for UPnP is disabled. If this check box is not selec\
ted, the wireless  modem router does not allow any device to automatically control the reso\
urces, such as 
port forwarding (mapping) of the wireless modem router. 
Advertisement Period.  The advertisement period is how often the wireless modem 
router broadcasts its UPnP information. 
 This value can range from 1 to 1440 minutes. 
The default period is 30 minutes. Shorter durations ensure that control \
points have  current device status at the expense of additional network traffic. Longer durations can 
compromise the freshness of the device status, but can significantly red\
uce network 
traffic.
Advertisement Time to Live.  The time to live for the advertisement is measured in hops 
(steps) for each UPnP packet sent. 
 The time to live hop count is the number of steps a 
broadcast packet is allowed to propagate for each UPnP advertisement bef\
ore 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 might be 
necessary to increase this value.
UPnP Portmap Table.  The UPnP Portmap 
 Table displays the IP address of each UPnP 
device that is currently accessing the wireless modem router and which p\
orts (internal 
and external) that device has opened. The UPnP Portmap Table also displays what type 
of port is open and whether that port is still active for each IP addres\
s. 
3.  Click  Apply  to save your settings.