Netgear C6900 High Speed Cable Modem Router User Manual

							Manage Your Network 71
 Nighthawk AC1900
 WiFi Cable Modem  Router
Specify a DNS Account
To set up Dynamic DNS in the modem router:
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 window opens.
3.  Enter the user name and password.
The user name is  admin. 
 The user name and password are case-sensitive.
The BASIC Home page displays.
4.  Select  ADV
 ANCED > Advanced Settings > Dynamic DNS .
5.  Select the Use a Dynamic DNS Service  check box.
6.  In the Service Provider list, select your service provider from the list.
7.  In the Host Name field, type the host name (sometimes called the domain name) for your\
 
account.
8.  In the User Name field, enter the user name for your account.
9.  In the Password (6-32 characters) field, type the password for your DDNS account.
10.  Click the  Apply button.
Your changes are saved.
11.  T
o verify that your Dynamic DNS service is enabled in the  modem router, click the Show 
Status button.
A message displays the Dynamic DNS status.
Change the Dynamic DNS Settings
To change your settings:
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 . 
						

							Manage Your Network 
72 Nighthawk AC1900 WiFi Cable Modem Router 
A login window opens.
3. Enter the user name and password.
The user name is admin. The user name and password are case-sensitive.
The BASIC Home page displays.
4. Select ADVANCED > Advanced Settings > Dynamic DNS.
5. Change your DDNS account settings as necessary.
6. Click the Apply button.
Your changes are saved.
Remote Management
The remote management feature lets you access your modem router over the Internet to 
view or change its settings. You need to know the modem router’s WAN IP address to use 
this feature. 
Note:Be sure to change the password for the user name admin to a secure 
password. The ideal password contains no dictionary words from any 
language and contains uppercase and lowercase letters, numbers, 
and symbols. It can be up to 30 characters. See 
Change the admin 
Password on page 56.
To set up remote management:
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 window opens.
3. Enter the user name and password.
The user name is admin. The user name and password are case-sensitive.
The BASIC Home page displays. 
						

							Manage Your Network 73
 Nighthawk AC1900
 WiFi Cable Modem  Router
4. Select  ADVANCED > Advanced Setup > Remote Management . 
5.  Select the T
 urn Remote Management On  check box.
6.  In the 
Allow Remote Access By section, specify the external IP addresses to be allowed to 
access the modem router’s  remote management:
Note: For enhanced security, restrict access to as few external IP addresses 
as practical
Select one of the following:
• T
o allow access from a single IP address on the Internet, select the Only This 
Computer  radio button. Enter the IP address to be allowed access. 
• T
o allow access from a range of IP addresses on the Internet, select the \
IP Address 
Range radio button. Enter a beginning and ending IP address to define the all\
owed 
range. 
• T
o allow access from any IP address on the Internet, select the Everyone  radio 
button. 
7.  Specify the port number for accessing the web management interface.
Normal web browser access uses the standard HTTP service port 80. For gr\
eater 
security
 , enter a custom port number for the remote web management interface. Ch\
oose 
a number from 1024 to 65535, but do not use the number of any common ser\
vice port. 
The default is 8080, which is a common alternate for HTTP.
8.  Click the  Apply button.
Your changes take effect.
To use remote access:
1.  Launch an Internet browser on a computer that is not on your home networ\
k.
2.  T
ype your modem router’s WAN IP address into your browser’s address or location field 
followed by a colon (:) and the custom port number. 
For example, if your external address is 134.177.0.123 and you use port \
number 8080, 
enter http://134.177.0.123:8080 in your browser
 . 
						

							74
7
7.   Specify Internet Port Settings
You can use port forwarding and port triggering to set up rules for Internet traffic. You need 
networking knowledge to set up these features.
This chapter includes the following sections:
•Set Up Port Forwarding to a Local Server 
•Set Up Port Triggering  
						

							Specify Internet Port Settings 75
 Nighthawk AC1900
 WiFi Cable Modem  Router
Set Up Port Forwarding to a Local Server
If you have a server in your home network, you can allow certain types o\
f incoming traffic to 
reach the server. For example, you might want to make a local web server, FTP server, or 
game server visible and available to the Internet.
The modem router can forward incoming traffic with specific protocols to computers on your  local network. 
 You can specify the servers for applications and you can also specify a d\
efault 
DMZ server to which the modem router forwards all other incoming protoco\
ls.
To forward specific incoming protocols:
1.  Decide which type of service, application, or game you want to provide.
2.  Find the local IP address of the computer on your network that will prov\
ide the service.
The server computer must always have the same IP address. To specify this setting, use  the reserved IP address feature. See Reserve LAN IP Addresses  on page
  44.
3.  Launch an Internet browser from a computer or wireless device that is co\
nnected to the 
network.
4.  T
ype  http://www.routerlogin.net  or http://www.routerlogin.com .
A login window opens.
5.  Enter the user name and password.
The user name is  admin. 
 The user name and password are case-sensitive.
The BASIC Home page displays.
6.  Select  ADV
 ANCED > Advanced Setup > Port Forwarding/Port Triggering.
7.  Leave the  Port Forwarding  radio button selected as the service type.
8.  In the Service Name list, select the service name.
If the service that you want to add is not in the list, create a custom \
service. See  Add a 
Custom Port Forwarding Service on page  76. 
						

							Specify Internet Port Settings 76
Nighthawk AC1900
 WiFi Cable Modem  Router 
9. In the Server IP Address field, enter the IP address of the computer that will provide th\
e 
service. 
10.  Click the  Add button.
The service displays in the list.
Add a Custom Port Forwarding Service
To add a custom service:
1.  Find out which port number or range of numbers the application uses.
You can usually find this information by contacting the publisher of the \
application or user  groups or news groups.
2.  Launch an Internet browser from a computer or wireless device that is co\
nnected to the 
network.
3.  T
ype  http://www.routerlogin.net  or http://www.routerlogin.com .
A login window opens.
4.  Enter the user name and password.
The user name is  admin. 
 The user name and password are case-sensitive.
The BASIC Home page displays.
5.  Select  ADV
 ANCED > Advanced Setup > Port Forwarding/Port Triggering.
6.  Leave the  Port Forwarding radio button selected as the service type.
7.  Click the  Add Custom Service  button.
8.  In the Service Name field, enter a descriptive name. 
9.  In the Service T
 ype field, select the protocol. If you are unsure, select  TCP/UDP.
10.  In the  External Starting Port field, enter the beginning port number
 . 
If the application uses a single port, enter the same port number in the\
 Ending Port field.
If the application uses a range of ports, enter the ending port number o\
f the range in the 
External Ending Port field. 
						

							Specify Internet Port Settings 
77  Nighthawk AC1900 WiFi Cable Modem Router
11. 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.
12. Type the IP address in the Internal IP address field or select the radio button for an 
attached device listed in the table.
13. Click the Apply button. 
The service is now in the list on the Port Forwarding/Port Triggering page.
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 window opens.
3. Enter the user name and password.
The user name is admin. The user name and password are case-sensitive.
The BASIC Home page displays.
4. Select ADVANCED > Advanced Setup > Port Forwarding/Port Triggering.
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 page displays.
8. Specify changes to any of the following settings:
•Service Name. Type the service name.
•Service Type. If you are unsure, select TCP/UDP.
•External Starting Port: 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.
•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 the 
radio button for an attached device listed in the table.
9. Click the Apply button.
Your changes are saved. 
						

							Specify Internet Port Settings 
78 Nighthawk AC1900 WiFi Cable Modem 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 window opens.
3. Enter the user name and password.
The user name is admin. The user name and password are case-sensitive.
The BASIC Home page displays.
4. Select ADVANCED > Advanced Setup > Port Forwarding/Port Triggering.
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.
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 modem router always gives your web server an IP address of 
192.168.0.33. 
2. In the Port Forwarding/Port Triggering page, configure the modem router to forward the 
HTTP service to the local address of your web server at 192.168.0.33. 
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 page of the modem 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 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:  
						

							Specify Internet Port Settings 
79  Nighthawk AC1900 WiFi Cable Modem Router
•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 number for a web server 
process.
2. Your modem router receives the message and finds your port forwarding rule for incoming 
port 80 traffic. 
3. The modem router changes the destination in the message to IP address 192.168.0.123 
and sends the message to that computer.
4. Your web server at IP address 192.168.0.123 receives the request and sends a reply 
message to your modem router.
5. Your modem 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 modem router monitors traffic to the Internet from an outbound 
“trigger” port that you specify. For outbound traffic from that port, the modem router saves the 
IP address of the computer that sent the traffic. The modem 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).
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.
2. Type http://www.routerlogin.net or http://www.routerlogin.com. 
						

							Specify Internet Port Settings 80
Nighthawk AC1900
 WiFi Cable Modem  Router 
A login window opens.
3.  Enter the user name and password.
The user name is  admin. 
 The user name and password are case-sensitive.
The BASIC Home page displays.
4.  Select  ADV
 ANCED > Advanced Setup > Port Forwarding/Port Triggering.  
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.  In the Service User list, select  Any
 , or select Single address and enter the IP address of 
one computer:
• 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  Connection T
 ype, 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  modem router used port triggering for the service that you added. See th\
e following 
section.
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 modem router to open mo\
re incoming ports 
when a particular outgoing port starts a session.