Netgear R6700 Nighthawk Ac1750 Smart Wifi Router Dual Band Gigabit User Manual

							Specify Internet Port Settings 
161  Nighthawk AC1750 Smart WiFi Router
11. If the application uses a single port, enter the same port number in the External Ending 
Port field.
If the application uses a range of ports, enter the ending port number of the range in the 
External Ending Port field.
12. Specify the internal ports by one of these methods:
•Leave the Use the same port range for Internal port check box selected.
•Type the port numbers in the Internal Starting Port and Internal Ending Port fields.
13. In the Internal IP address field, type the IP address or select the radio button for an 
attached device listed in the table.
14. Click the Apply button. 
The service is now in the list on the Port Forwarding/Port Triggering screen.
Edit a Port Forwarding Service
To edit a port forwarding entry:
1. Launch an Internet 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.
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. Leave the Port Forwarding radio button selected as the service type.
6. In the table, select the radio button next to the service name.
7. Click the Edit Service button.
The Ports - Custom Services screen displays.
8. Change the settings as needed.
9. Click the Apply button.
Your changes are saved. 
						

							Specify Internet Port Settings 
162 Nighthawk AC1750 Smart WiFi Router 
Delete a Port Forwarding Entry
To delete a port forwarding entry:
1. Launch an Internet 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.
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 Forwarding radio button as the service type.
6. In the table, select the radio button next to the service name.
7. Click the Delete Service button.
The service is deleted.
Application Example: Make 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 router always gives your web server an IP address of 192.168.1.33. 
2. In the Port Forwarding/Port Triggering screen, configure the 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 specify that name in the 
Dynamic DNS screen of the router. 
Dynamic DNS makes it much easier to access a server from the Internet 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 Router Implements the Port Forwarding Rule
The following sequence shows the effects of a port forwarding rule: 
						

							Specify Internet Port Settings 
163  Nighthawk AC1750 Smart WiFi Router
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 router.
•Destination port number. 80, which is the standard port number for a web server 
process.
2. Your router receives the message and finds your port forwarding rule for incoming port 80 
traffic. 
3. The router changes the destination in the message to IP address 192.168.1.123 and sends 
the message to that computer.
4. Your web server at IP address 192.168.1.123 receives the request and sends a reply 
message to your router.
5. Your router performs Network Address Translation (NAT) on the source IP address, and 
sends the reply through the Internet to the computer or wireless device that sent the web 
page request. 
Set Up Port Triggering
Port triggering is a dynamic extension of port forwarding that is useful in these cases:
•An application must use port forwarding to more than one local computer (but not 
simultaneously).
•An application must open incoming ports that are different from the outgoing port.
With port triggering, the router monitors traffic to the Internet from an outbound “trigger” port 
that you specify. For outbound traffic from that port, the router saves the IP address of the 
computer that sent the traffic. The router temporarily opens the incoming port or ports that 
you specify in your rule and forwards that incoming traffic to that destination.
Port forwarding creates a static mapping of a port number or range of ports to a single local 
computer. Port triggering can dynamically open ports to any computer when needed and 
close the ports when they are no longer needed.
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 
and Play (UPnP). See 
Improve Network Connections with Universal 
Plug and Play on page 53.
Add a Port Triggering Service
To add a port triggering service:
1. Launch an Internet browser from a computer or wireless device that is connected to the 
network. 
						

							Specify Internet Port Settings 164
Nighthawk AC1750
 Smart  WiFi Router 
2. Type  http://www.routerlogin.net  or http://www.routerlogin.com .
A login screen displays.
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  ADV
 ANCED > Advanced Setup > Port Forwarding/Port Triggering.
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 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 Connection T
 ype, Starting Port, and  Ending Port fields, enter the inbound 
connection port information.
12.  Click the  Apply button.
The service is added. You must enable port triggering before the router uses port  triggering for the service that you added. See Enable Port Triggering on page  165. 
						

							Specify Internet Port Settings 165
 Nighthawk AC1750
 Smart WiFi Router
Enable Port Triggering
To enable port triggering: 
1. Launch an Internet browser from a computer or wireless device that is co\
nnected to the 
network.
2.  T
ype  http://www.routerlogin.net  or http://www.routerlogin.com .
A login screen displays.
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  ADV
 ANCED > Advanced Setup > Port Forwarding/Port Triggering.
The Port Forwarding/Port Triggering screen displays.
5.  Select the Port T
 riggering radio button.
6. Clear the Disable Port Triggering check box.
If this check box is selected, the router does not use port triggering e\
ven if you have 
specified port triggering settings.
7.  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.
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  
						

							Specify Internet Port Settings 
166 Nighthawk AC1750 Smart WiFi Router 
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. 
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. 
						

							167
14
14.   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 
168 Nighthawk AC1750 Smart WiFi Router 
Quick Tips
See the following for tips for troubleshooting some common problems:
•Sequence to Restart Your Network on page 168
•Check Ethernet Cable Connections on page 168
•Wireless Settings on page 168
•Network Settings on page 168
Sequence to Restart Your Network
When you must 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 169
 Nighthawk AC1750
 Smart WiFi Router
Troubleshoot with the LEDs
By default, the router is set with standard LED settings. If you disable\
d blinking for the LEDs 
or turned off all LEDs except the Power LED, you must return the LEDs to their stand\
ard 
settings for troubleshooting. For information about controlling the LED \
settings, see  Disable 
LED Blinking or Turn Off LEDs  on page
  104.
Standard LED Behavior When the Router Is Powered On
After you turn on power to the router, the following sequence of events \
occurs:
1.  When power is first applied, verify that the Power LED 
 is lit.
2.  After approximately 30 seconds, verify the following:
• The Power LED is solid white.
• The Internet LED is lit.
• The WiFi LED is lit unless you turned of
 f the wireless radio.
You can use the LEDs on the front panel of the router for troubleshooting\
.
Power LED Is Off or Blinking
Is the Power LED is off or blinking, try 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 detects\
 a problem with the 
firmware. If the error persists, a hardware problem exists. 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 powered on, the Power LED lights amber for about 20 s\
econds and then 
lights white. If the LED does not turn white, the router is experiencing\
 a problem.
If the Power LED is still amber one minute after you turn on power to th\
e 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  178.
If the error persists, you might be experiencing a hardware problem. Con\
tact technical 
support at www.netgear.com/support. 
						

							Troubleshooting 
170 Nighthawk AC1750 Smart 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 178.
If the error persists, you might be experiencing a hardware problem. 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 the WiFi On/Off button on the router was pressed. 
This button turns the wireless radios in the router on and off. The WiFi LED is lit when the 
wireless radios are 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, 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 address is in