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Page 146 / 161 Scroll up to view Page 141 - 145
Specify Internet Port Settings
146
N600 WiFi Dual Band Gigabit 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.
Select
ADVANCED > Advanced Setup > Port Forwarding/Port Triggering
.
The Port Forwarding/Port Triggering screen displays.
5.
Select the
Port Triggering
radio button.
6.
Select the
Disable Port Triggering
check box.
If this check box is selected, the router does not use port triggering even if you specified
port triggering settings.
Application Example: Port Triggering for Internet Relay Chat
Some application servers, such as FTP and IRC servers, send replies to multiple port
numbers. Using port triggering, you can tell the router to open more incoming 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 6667, 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.
You open an IRC client program to start a chat session on your computer.
2.
Your IRC client composes a request message to an IRC server using a destination port
number of 6667, the standard port number for an IRC server process. Your computer then
sends this request message to your router.
3.
Your router creates an entry in its internal session table describing this communication
session between your computer and the IRC server. Your router stores the original
information, performs Network Address Translation (NAT) on the source address and port,
and sends this request message through the Internet to the IRC server.
Page 147 / 161
Specify Internet Port Settings
147
N600 WiFi Dual Band Gigabit Router
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.
Page 148 / 161
148
13
13.
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
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
Page 149 / 161
Troubleshooting
149
N600 WiFi Dual Band Gigabit 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 LED lights.
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.
Page 150 / 161
Troubleshooting
150
N600 WiFi Dual Band Gigabit Router
Troubleshoot with the LEDs
You can use the LEDs to identify setup or performance problems in the router 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 sequence 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 LED
is lit.
•
The WiFi LED
is lit unless you turned off 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 and securely
connected to a working power outlet.
•
Check that you are using the power adapter that NETGEAR supplied for this 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 detects a problem with the
firmware. If the error persists, a hardware problem might be the cause. 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 minutes and then
turns green. If the LED does not turn green, this indicates a problem with the router.
If the Power LED is still amber three minutes after you turn on power to the router, do the
following:
1.
Turn 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
159.
If the error persists, a hardware problem might be the cause. Contact technical support at
www.netgear.com/support.

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