Netgear C7100v High Speed Cable Modem Router User Manual

Specify Internet Port Settings 
111  AC1900 Cable Modem Voice Router
•For the internal ports, leave the Use the same port range for Internal port check 
box selected.
•Internal IP address. Type the IP address in the Internal IP address field, or select 

9. Click  the Apply  button.
Your settings are saved.
Delete a Port Forwarding Entry
To delete a port forwarding entry:
1. Launch  an  Internet  browser  from  a  computer  or  mobile  device  that  is  connected  to  the 
network.
2. Type...

Specify Internet Port Settings 
112 AC1900 Cable Modem Voice Router 
3. (Optional) Register a host name with a Dynamic DNS service, and specify that name in the 
Dynamic  DNS  page.
ternet because you 
can type the name in the Internet browser. Otherwise, you must know the IP address that 
the ISP assigned, which typically changes.
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...

Specify Internet Port Settings 113
 AC1900 Cable Modem Voice Router
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), enable Universal 
Plug-N-Play (UPnP).
Add a Port Triggering Service
To add a port triggering service:
1. Launch 
 an  Internet  browser  from  a  computer  or  mobile  device  that  is  connected  to  the 
network.
2.  T
ype  http://www.routerlogin.net...

Specify Internet Port Settings 
114 AC1900 Cable Modem Voice Router 
10. In  the Service  Type fields,  enter  the  starting  and  ending  ports. 
11. Enter  the  inbound  connection  port  information  in  the Starting  Port  and Ending  Port  fields.
12. Click  the Apply  button.
The service is now in the Portmap table. You must enable port triggering before the 
d.
Application Example: Port Triggering for Internet Relay Chat 
lies to multiple port 
o open more incoming ports 
when a particular...

115
11
11.   Troubleshooting
e problems you might 
ion here, check the NETGEAR 
support site at http://support.netgear.com for product and contact information.
This chapter contains the following sections:
•Troubleshoot with the LEDs 
•Changes Not Saved 
•Cannot Log In to the Modem Router 
•WiFi Connectivity 
•Phone Does Not Get a Dial Tone 
•Troubleshoot Your Network Using the Ping Utility  

Troubleshooting 
116 AC1900 Cable Modem Voice Router 
Troubleshoot with the LEDs
Y troubleshooting.
Power LED Is Off
•Make sure that the power cord is securely connected to your modem router and securely 
connected to a working power outlet. 
•or this product.
•www.netgear.com/support.
LEDs Never Turn Off
When the modem router is turned on, the LEDs light for about 10 seconds and then turn off. If 
outer.
lowing:
1. Cycle  the  power  to  see  if  the  modem  router  recovers.
2. Press and hold the Reset...

Troubleshooting 
117  AC1900 Cable Modem Voice Router
Cannot Log In to the Modem Router
 or mobile device on your 
local network, check the following:
1. Make  sure  that  you  are  connected  to  the  modem  router’s  wired  or  WiFi  network.
•nnection is secure 

•For a WiFi connection, make sure that you selected the correct network.If you cannot 
ed on (its Power 
that someone turned off 
the SSID broadcast or the turned off the WiFi radios. See 
WiFi Connectivity on 
page 11 8.
2. If you are...

Troubleshooting 
118 AC1900 Cable Modem Voice Router 
Changes Not Saved
odem router interface, 
check the following:
•Apply button before moving to 
another page or tab, or your changes are lost. 
•Click the Refresh or Reload button in the web browser. It is possible that the changes 

Troubleshooting 
119  AC1900 Cable Modem Voice Router
-on.
Is your modem router too far from your computer, or too close? Place your computer 
and see if the signal 
strength improves.
nal. See Position Your 
Modem Router on page 13.
Phone Does Not Get a Dial Tone 
To troubleshoot a phone without a dial tone:
1. Check  the  modem  router  LEDs:
ving power.
nnected to the Internet.
The T this LED is off, the phone 
I the hook.
If the Tolid, proceed to the following 
step.
2. Make  sure  that  the...

Troubleshooting 
120 AC1900 Cable Modem Voice Router 
ping www.routerlogin.net
3. Click  the OK  button.
You should see a message like this one:
Pinging  with 32 bytes of data
If the path is working, you see this message:
Reply from < IP address >: bytes=32 time=NN ms TTL=xxx
If the path is not working, you see this message:
Request timed out
If the path is not functioning correctly, you might be experiencing one of the following 
problems:
•Wrong physical connections
D is lit for the port to 
which you...