Netgear Wnr2000v5 N300 Wifi Router User Manual

							Specify Internet Port Settings 91
 N300 WiFi 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 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 router forwards all other incoming protocols.
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
  60.
3.  Launch a web browser from a computer or wireless device that is connecte\
d to the network.
4.  T
ype  www.routerlogin.net  or www.routerlogin.com.
A login screen displays.
5.  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.
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  92.
9.  In the Server IP 
 Address field, enter the IP address of the computer that will provide the 
service. 
10.  Click the  Add button. 
						

							Specify Internet Port Settings 92
N300 WiFi Router 
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 service or applicatio\
n uses.
You can usually find this information by contacting the publisher of the \
application or user  groups or news groups.
2.  Launch a web browser from a computer or wireless device that is connecte\
d to the network.
3.  In the address field of the web browser
 , enter www.routerlogin.net  or 
www.routerlogin.com.
A login screen displays.
4.  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.
5.  Select  ADV
 ANCED > Advanced Setup > Port Forwarding/Port Triggering.
The Port Forwarding/Port Triggering screen displays.
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 Protocol field, select the protocol. If you are unsure, select  TCP/UDP.
10.  In the  External port range  field, enter the port numbers.
11.  Use one of the following methods to specify the internal port numbers:
• Leave Use the same port range for internal port check box selected.
• T
ype the port numbers in the Internal port range field. 
						

							Specify Internet Port Settings 
93  N300 WiFi Router
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 screen.
Edit a Port Forwarding Service
To edit a port forwarding entry:
1. Launch a web browser from a computer or wireless device that is connected to the 
network.
2. In the address field of the web browser, enter www.routerlogin.net or 
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. Specify changes as needed.
9. Click the Apply button.
Your changes are saved.
Delete a Port Forwarding Entry
To delete a port forwarding entry:
1. Launch a web browser from a computer or wireless device that is connected to the 
network.
2. In the address field of the web browser, enter www.routerlogin.net or 
www.routerlogin.com.
A login screen displays.
3. Enter the router user name and password. 
						

							Specify Internet Port Settings 
94 N300 WiFi Router 
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.
5. Leave the Port Forwarding radio button selected 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 router always gives your web server an IP address of 192.168.0.33. 
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 192.168.0.33. 
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 screen of the router. 
For more information, see Dynamic DNS on page 73.
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 Internet provider assigned, which typically changes.
How the 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 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. 
						

							Specify Internet Port Settings 
95  N300 WiFi Router
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 uses port forwarding to more than one local computer (but not 
simultaneously).
•An application opens 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 enabled port triggering because 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 41.
Add a Port Triggering Service
To add a port triggering service:
1. Launch a web browser from a computer or wireless device that is connected to the 
network.
2. In the address field of the web browser, enter www.routerlogin.net or 
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. 
						

							Specify Internet Port Settings 96
N300 WiFi Router 
4. 
Select  ADVANCED > 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
 . You must enter the IP 
address of the computer to which you want to grant access.
9.  From the Service T
 ype list, select a service. 
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. 
						

							Specify Internet Port Settings 
97  N300 WiFi Router
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. 
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 and removes the session information from its session table, and incoming 
traffic is no longer accepted on port numbers 33333 or 113. 
						

							98
9
9.   Troubleshooting
This chapter provides information to help you diagnose and solve problems you might have with 
your router. If you do not find the solution here, visit the NETGEAR support site at 
http://support.netgear.com for product and contact information.
This chapter contains the following sections:
•Forgotten Passwords 
•WiFi Connections 
•Changes Not Saved 
•Troubleshoot with the LEDs 
•Cannot Log In to the Router 
•The Router Cannot Access the Internet 
•Troubleshoot Your Network Using the Ping Utility 
•Troubleshoot IP Addresses  
						

							Troubleshooting 
99  N300 WiFi Router
Forgotten Passwords
The router user name admin lets you use a web browser to log in to the router to view or 
change its settings. The router’s WiFi network name lets you connect to its WiFi network. 
Both admin and the WiFi network have passwords by default, which are on labels on the 
bottom of the router.
admin Password
The default password for the router user name admin is password. If you changed it and 
enabled password recovery, you can recover the password. 
If you changed the password and did not enable password recovery, you can use the Reset 
button to return the router to its factory settings. This erases all the router’s current settings 
including its Internet connection settings. For more information, see 
Factory Settings on 
page 111.
To recover your password when password recovery is enabled:
1. Launch a web browser from a computer or wireless device that is connected to the 
network.
2. In the address field of your browser, type www.routerlogin.net or www.routerlogin.com.
A login screen displays. 
3. Click the Cancel button.
If password recovery is enabled, you are prompted to enter the serial number of the 
router.
The serial number is on a label on the bottom of the router.
4. Enter the serial number of the router.
5. Click the Continue button.
A screen displays requesting the answers to your security questions.
6. Enter the saved answers to your security questions.  
7. Click the Continue button.
A screen displays your recovered password.
8. Click the Login again button.
A login screen displays.
9. With your recovered password, log in to the router. 
						

							Troubleshooting 100
N300 WiFi Router 
WiFi Passwords
The router 
comes preset with a unique WiFi network name and WiFi password. This 
information is on a label on the bottom of the router. You can also set up a guest network to 
allow visitors to access your Internet connection. 
If you changed the WiFi settings and do not remember what they are, you \
can use a wired 
Ethernet connection to log in to the router t
 o view the WiFi settings. 
To use a wired connection to view WiFi settings:
1. Use an Ethernet cable to connect your computer to a numbered Ethernet LA\
N port on 
the  router.
Ethernet LAN ports
Internet port
Do not connect this Ethernet cable to the yellow Internet port on the ro\
uter.
2.  Launch a web browser from the connected computer
 .
3.  In the address field of the web browser
 , enter www.routerlogin.net  or 
www.routerlogin.com.
A login screen displays.
4.  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.
5.  T
o view the WiFi settings, select Wireless.
The Wireless Network screen displays.
6.  T
o view guest network settings, select  Guest.
The Guest Network Settings screen displays.