Netgear Wndr4500v3 N900 Wifi Dual Band Gigabit Router Premium Edition User Manual

							Specify Internet Port Settings 141
 N900 WiFi Router
The Port Forwarding/Port Triggering screen displays.
5.  Select the Port T
 riggering radio button.
6.  Click the  Add Service button.
7. In the Service Name (If Required)  field, type a descriptive service name. 
8.  From the Service User  list, select a user option:
• Any  (the default) allows any computer on the Internet to use this service\
. 
• Single address restricts the service to a particular computer
 . 
9.  From the Service T
 ype list, select TCP or UDP or  TCP/UDP (both). 
If you are not sure, select TCP/UDP .
10.  In the T
riggering Port  field, enter the number of the outbound traffic port that will open the 
inbound ports. 
11.  In the Service T
 ype, Starting Port, and  Ending Port fields, enter the inbound connection 
information.
12.  (Optional) In the Port T
 riggering Timeout field, enter a value up to 9999 minutes. 
This value controls how long the inbound ports stay open when the router\
 detects no  activity
 . This value is required because the router cannot detect when the applica\
tion 
terminates.
13.  Click the  Apply button.
The service is now in the Portmap Table. 
Disable Port Triggering
You can disable port triggering. The port triggering services that you set up are saved but are  not used.
To disable port triggering: 
1.  Launch a web browser from a computer or wireless device that is connecte\
d to the 
network.
2.  T
ype  http://www.routerlogin.net  or http://www.routerlogin.com .
A login screen displays. 
						

							Specify Internet Port Settings 142
N900 WiFi Router 
3. 
Enter the user name and password.
The user name is  admin. 
 The default password is password . The user name and 
password are case-sensitive.
The BASIC Home screen displays.
4.  Select  ADV
 ANCED > Advanced Setup > Port Forwarding/Port Triggering.
The Port Forwarding/Port Triggering screen displays.
5.  Select the  Port T
 riggering radio button.
6. Select the  Disable Port Triggering check box.
If this check box is selected, the router does not use port triggering e\
ven if you specified 
port triggering settings.
7.  Click the  Apply button.
Your settings are saved.
Application Example: Port Triggering for Internet Relay Chat 
Some application servers, such as FTP and IRC servers, send replies to m\
ultiple port 
numbers. Using port triggering, you can tell the router to open more inc\
oming ports when a 
particular outgoing port starts a session.
An example is Internet Relay Chat (IRC). Your computer connects to an IRC server at  destination port 6667. 
 The IRC server not only responds to your originating source port but 
also sends an “identify” message to your computer on port 113. Using port triggering, you can 
tell the router, “When you initiate a session with destination port 6\
667, you must also allow 
incoming traffic on port 113 to reach the originating computer.” The following sequence shows 
the effects of this port triggering rule:
1.  Y
ou open an IRC client program to start a chat session on your computer. 
2. Y
our IRC client composes a request message to an IRC server using a desti\
nation port 
number of 6667, the standard port number for an IRC server process. Your computer then 
sends this request message to your  router.
3.  Y
our  router creates an entry in its internal session table describing this communica\
tion 
session between your computer and the IRC server. Your  router stores the original  
						

							Specify Internet Port Settings 
143  N900 WiFi Router
information, performs Network Address Translation (NAT) on the source address and port, 
and sends this request message through the Internet to the IRC server. 
4. Noting your port triggering rule and observing the destination port number of 6667, your 
router creates another session entry to send any incoming port 113 traffic to your computer.
5. The IRC server sends a return message to your router using the NAT-assigned source port 
(for example, port 33333) as the destination port and sends an “identify” message to your 
router with destination port 113.
6. When your router receives the incoming message to destination port 33333, it checks its 
session table to see if a session is active for port number 33333. Finding an active session, 
the router restores the original address information replaced by NAT and sends this reply 
message to your computer.
7. When your router receives the incoming message to destination port 113, it checks its 
session table and finds an active session for port 113 associated with your computer. The 
router replaces the message’s destination IP address with your computer’s IP address and 
forwards the message to your computer.
8. When you finish your chat session, your router eventually senses a period of inactivity in the 
communications. The router then removes the session information from its session table 
and incoming traffic is no longer accepted on port numbers 33333 or 113. 
						

							144
12
12.   Troubleshooting
This chapter provides information to help you diagnose and solve problems you might 
experience with your router. If you do not find the solution here, check the NETGEAR support 
site at http://support.netgear.com for product and contact information.
This chapter contains the following sections:
•Quick Tips 
•Troubleshoot with the LEDs 
•Cannot Log In to the Router 
•Cannot Access the Internet 
•Changes Not Saved 
•Wireless Connectivity 
•Troubleshoot Your Network Using the Ping Utility  
						

							Troubleshooting 
145  N900 WiFi Router
Quick Tips
This section describes tips for troubleshooting some common problems.
Sequence to Restart Your Network
When you need to restart your network, follow this sequence:
1. Turn off and unplug the modem. 
2. Turn off the router.
3. Plug in the modem and turn it on. Wait two minutes.
4. Turn on the router and wait two minutes.
Check Ethernet Cable Connections
If your device does not power on, make sure that the Ethernet cables are securely plugged 
in. The Internet LED on the router is lit if the Ethernet cable connecting the router and the 
modem is plugged in securely and the modem and router are turned on. If one or more 
powered-on computers are connected to the router by an Ethernet cable, the corresponding 
numbered router LAN port LEDs light. 
Wireless Settings
Make sure that the wireless settings in the computer and router match exactly. The wireless 
network name (SSID) and wireless security settings of the router and wireless computer must 
match exactly. 
If you set up an access list in the Advanced Wireless Settings screen, you must add each 
wireless computer’s MAC address to the router’s access list.
Network Settings
Make sure that the network settings of the computer are correct. Wired and wirelessly 
connected computers must use network (IP) addresses on the same network as the router. 
The simplest way to do this is to configure each computer to obtain an IP address 
automatically using DHCP. 
Some cable modem service providers require you to use the MAC address of the computer 
initially registered on the account. You can view the MAC address in the Attached Devices 
screen. 
						

							Troubleshooting 146
N900 WiFi Router 
Troubleshoot with the LEDs
You can use the LEDs to identify setup or performance problems in the rou\
ter and to isolate 
the cause.
Standard LED Behavior When the Router Is Powered On
After you turn on power to the router, make sure that the following sequ\
ence of events  occurs:
1.  When power is first applied, verify that the Power LED 
 is lit.
2.  After about two minutes, verify the following:
• The Power LED is solid green.
• The Internet ED is lit.
• The 2.4 GHz and 5 GHz LEDs are lit unless you turned of
 f the wireless radios.
You can use the LEDs on the front panel of the router for troubleshooting\
.
Power LED Is Off or Blinking
Do the following:
• Make sure that the power adapter is securely connected to your router an\
d securely 
connected to a working power outlet. 
• Check that you are using the power adapter that NETGEAR supplied for thi\
s product.
• If the Power LED blinks slowly and continuously
 , the router firmware is corrupted. This 
can happen if a firmware upgrade is interrupted, or if the router detect\
s a problem with the 
firmware. If the error persists, it is likely that a hardware problem ex\
ists. For recovery 
instructions, or help with a hardware problem, contact technical support\
 at 
www.netgear.com/support.
Power LED Stays Amber
When the router is turned on, the Power LED lights amber for up to two m\
inutes and then 
turns green. If the LED does not turn green, this indicates a problem wi\
th the router.
If the Power LED is still amber three minutes after you turn on power to\
 the router, do the 
following:
1.  T
urn off the power and then turn it back on to see if the router recovers.
2.  Press and hold the  Reset button to return the router to its factory settings. 
See Factory Settings on page  155.
If the error persists, a hardware problem might be the cause. Contact te\
chnical support at 
www.netgear.com/support. 
						

							Troubleshooting 
147  N900 WiFi Router
LEDs Never Turn Off
When the router is turned on, the LEDs light for about 10 seconds and then turn off. If all the 
LEDs stay on, this indicates a fault within the router.
If all LEDs are still lit one minute after power-up, do the following:
•Cycle the power to see if the router recovers.
•Press and hold the Reset button to return the router to its factory settings. For more 
information, see 
Factory Settings on page 155.
If the error persists, a hardware problem might be the cause. Contact technical support at 
www.netgear.com/support.
Internet or Ethernet Port LEDs Are Off
If either the Ethernet port LEDs or the Internet LED does not light when the Ethernet 
connection is made, check the following:
•Make sure that the Ethernet cable connections are secure at the router and at the modem 
or computer.
•Make sure that power is turned on to the connected modem or computer.
•Be sure that you are using the correct cable.
When connecting the router’s Internet port to a cable or DSL modem, use the cable that 
was supplied with the cable or DSL modem. This cable can be a standard 
straight-through Ethernet cable or an Ethernet crossover cable.
WiFi LED Is Off
If the WiFi LED stays off, check to see if someone pressed the WiFi On/Off button on the 
router. This button turns the wireless radios in the router on and off. The WiFi LED is lit when 
a wireless radio is turned on.
Cannot Log In to the Router
If you are unable to log in to the router from a computer on your local network, check the 
following:
•If you are using an Ethernet-connected computer, check the Ethernet connection 
between the computer and the router.
•Make sure that the IP address of your computer is on the same subnet as the router. If 
you are using the recommended addressing scheme, your computer’s address is in the 
range of 192.168.1.2 to 192.168.1.254. 
•If your computer’s IP address is shown as 169.254.x.x, this is because recent versions of 
Windows and Mac OS generate and assign an IP address if the computer cannot reach a 
DHCP server. These autogenerated addresses are in the range of 169.254.x.x. If your IP  
						

							Troubleshooting 
148 N900 WiFi Router 
address is in this range, check the connection from the computer to the router, and reboot 
your computer.
•If your router’s IP address was changed and you do not know the current IP address, 
clear the router’s configuration to factory defaults. This sets the router’s IP address to 
192.168.1.1. For more information, see 
Factory Settings on page 155.
•Make sure that Java, JavaScript, or ActiveX is enabled in your browser. If you are using 
Internet Explorer, click the Refresh button to be sure that the Java applet is loaded.
•Try quitting the browser and launching it again.
•Make sure that you are using the correct login information. The user name is admin, and 
the default password is password. Make sure that Caps Lock is off when you enter this 
information.
•If you are attempting to set up your NETGEAR router as a replacement for an ADSL 
gateway in your network, the router cannot perform many gateway services. For 
example, the router cannot convert ADSL or cable data into Ethernet networking 
information. NETGEAR does not support such a configuration.
Cannot Access the Internet
If you can access your router but not the Internet, check to see if the router can obtain an IP 
address from your Internet service provider (ISP). Unless your ISP provides a fixed IP 
address, your router requests an IP address from the ISP. You can determine whether the 
request was successful using the ADVANCED Home screen.
To check the WAN IP address: 
1. Launch a web browser from a computer or wireless device that is connected to the 
network.
2. Select an external site such as www.netgear.com.
3. Type http://www.routerlogin.net or http://www.routerlogin.com.
A login screen displays.
4. Enter the router user name and password.
The user name is admin. The default password is password. The user name and 
password are case-sensitive.
The BASIC Home screen displays. 
5. Click the ADVANCED tab.
The ADVANCED Home screen displays.
6. Check that an IP address is shown for the Internet port. 
If 0.0.0.0 is shown, your router did not obtain an IP address from your ISP.
If your router cannot obtain an IP address from the ISP, you might need to force your cable or 
DSL modem to recognize your new router by restarting your network. For more information, 
see 
Sequence to Restart Your Network on page 145. 
						

							Troubleshooting 
149  N900 WiFi Router
If your router is still unable to obtain an IP address from the ISP, the problem might be one of 
the following:
•Your Internet service provider (ISP) might require a login program. 
Ask your ISP whether they require PPP over Ethernet (PPPoE) or some other type of 
login.
•If your ISP requires a login, the login name and password might be set incorrectly.
•Your ISP might check for your computer’s host name. 
Assign the computer host name of your ISP account as the account name in the Internet 
Setup screen.
•If your ISP allows only one Ethernet MAC address to connect to Internet and checks for 
your computer’s MAC address, do one of the following:
-Inform your ISP that you bought a new network device and ask them to use the 
router’s MAC address.
-Configure your router to clone your computer’s MAC address.
If your router obtained an IP address, but your computer is does not load any web pages 
from the Internet, it might be for one or more of the following reasons:
•Your computer might not recognize any DNS server addresses. 
A DNS server is a host on the Internet that translates Internet names (such as www 
addresses) to numeric IP addresses. Typically, your ISP provides the addresses of one or 
two DNS servers for your use. If you entered a DNS address during the router’s 
configuration, reboot your computer and verify the DNS address. You can configure your 
computer manually with DNS addresses, as explained in your operating system 
documentation.
•The router might not be configured as the TCP/IP gateway on your computer.
If your computer obtains its information from the router by DHCP, reboot the computer 
and verify the gateway address.
•You might be running login software that is no longer needed.
If your ISP provided a program to log you in to the Internet (such as WinPoET), you no 
longer need to run that software after installing your router. You might need to go to 
Internet Explorer and select Tools > Internet Options, click the Connections tab, and 
select Never dial a connection. Other browsers provide similar options.
Troubleshoot PPPoE
If you are using PPPoE, try troubleshooting your Internet connection.
To troubleshoot a PPPoE connection:
1. Launch a web browser from a computer or wireless device that is connected to the 
network.
2. Type http://www.routerlogin.net or http://www.routerlogin.com.
A login screen displays. 
						

							Troubleshooting 
150 N900 WiFi Router 
3. Enter the router user name and password.
The user name is admin. The default password is password. The user name and 
password are case-sensitive.
The BASIC Home screen displays. 
4. Click the ADVANCED tab.
The ADVANCED Home screen displays.
5. In the Internet Port pane, click the Connection Status button.
The Connection Status screen displays.
6. Check the Connection Status screen to see if your PPPoE connection is working.
If the router is not connected, click the Connect button. 
The router continues to attempt to connect indefinitely.
7. If you cannot connect after several minutes, the router might be set up with an incorrect 
service name, user name, or password, or your ISP might be experiencing a provisioning 
problem.
Unless you connect manually, the router does not authenticate using PPPoE until data is 
transmitted to the network.
Troubleshoot Internet Browsing
If your router can obtain an IP address but your computer is unable to load any web pages 
from the Internet, check the following:
•Your computer might not recognize any DNS server addresses. A DNS server is a host 
on the Internet that translates Internet names (such as www addresses) to numeric IP 
addresses.
Typically, your ISP provides the addresses of one or two DNS servers for your use. If you 
entered a DNS address during the router’s configuration, restart your computer.
Alternatively, you can configure your computer manually with a DNS address, as 
explained in the documentation for your computer.
•The router configured as the default gateway on your computer.
Reboot the computer and verify that the router address (www.routerlogin.net) is listed by 
your computer as the default gateway address.
•You might be running login software that is no longer needed. If your ISP provided a 
program to log you in to the Internet (such as WinPoET), you no longer need to run that 
software after installing your router. You might need to go to Internet Explorer and select 
Tools > Internet Options, click the Connections tab, and select the Never dial a 
connection. Other browsers provide similar options.