Netgear C3000 N300 Wifi Cable Modem Router User Manual

Specify Internet Port Settings 
91  N300 WiFi Cable Modem Router Model C3000
How the Modem Router Implements the Port Forwarding Rule
The following sequence shows the effects of a port forwarding rule:
1. When you type the URL www.example.com in your browser, the browser sends a web 
page request message with the following destination information: 
•Destination address. The IP address of www.example.com, which is the address of 
your modem router.
•Destination port number. 80, which is the standard port...

Specify Internet Port Settings 92
N300 WiFi Cable Modem Router Model C3000 
Add a Port Triggering Service
To add a port triggering service:
1. 
Launch a web browser from a computer or wireless device that is connecte\
d to the 
network.
2.  T
ype  http://routerlogin.net  or http://192.168.0.1.
A login screen displays.
3.  Enter the modem 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...

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 N300 WiFi Cable Modem Router Model C3000
•
Any  (the default) allows any computer on the Internet to use this service\
. 
• Single address restricts the service to a particular computer
 . 
9.  Select the service type, either  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.  Enter the inbound connection port information in the...

Specify Internet Port Settings 
94 N300 WiFi Cable Modem Router Model C3000 
•Never. The modem router does not use port triggering even if you have specified port 
triggering settings.
•Per Schedule. Port triggering is used based on the settings in the Schedule screen.
•Always. Always use port triggering.
7. In the Port Triggering Timeout field, enter a value up to 9999 minutes. 
This value controls how long the inbound ports stay open when the modem router detects 
no activity. This value is required...

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9
9.   Troubleshooting
This chapter gives information about troubleshooting your modem router. 
This chapter includes the following sections:
•Use LEDs to Troubleshoot 
•Cannot Log In to the Modem Router 
•Troubleshoot the ISP Connection 
•Troubleshoot a TCP/IP Network Using a Ping Utility 
Tip:NETGEAR provides helpful articles, documentation, and the latest 
software updates at 
support.netgear.com. 

Troubleshooting 96
N300 WiFi Cable Modem Router Model C3000 
Use LEDs to Troubleshoot
The following table provides help when using the LEDs for troubleshootin\
g.
Table 3.  LED troubleshooting
LED BehaviorAction
All LEDS are off when the modem  router is plugged in. Make sure that the power cord is properly connected to your modem 
router and that the power supply adapter is properly connected to a 
functioning power outlet. 
Check that you are using the 12 VDC power adapter from NETGEAR 
for this...

Troubleshooting 
97  N300 WiFi Cable Modem Router Model C3000
Note:If the IP address of your computer is shown as 169.254.x.x: 
Recent versions of Windows and Mac OS generate and assign an IP 
address when the computer cannot reach a DHCP server. These 
autogenerated addresses are in the range of 169.254.x.x. If your IP 
address is in this range, check the connection from the computer to 
the modem router and reboot your computer.
•If the IP address of your modem router has been changed and you do not...

Troubleshooting 
98 N300 WiFi Cable Modem Router Model C3000 
Use Ping to Test the LAN Path to Your Gateway
You can use ping to verify that the LAN path to your modem router is set up correctly.
To ping the modem router from a computer running Windows 95 or later:
1. From the Windows toolbar, click the Start button and select Run.
2. In the field that is provided, type ping and then the IP address of the modem router, as in 
this example:
ping 192.168.0.1
3. Click the OK button.
You see a message like...

Troubleshooting 
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If the path is working, you see this message:
Reply from < IP address >: bytes=32 time=NN ms TTL=xxx
2. If you do not receive this reply, do the following:
•Check that the Internet LED is lit.
•If your ISP assigned a host name to your computer, enter that host name as the 
account name in the Internet Setup screen.
•Check that your computer has the IP address of your modem router listed as the 
default gateway. If DHCP assigns the IP...

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A
A.   Supplemental Information
This appendix includes the following sections.
•Factory Default Settings 
•Technical Specifications