Advanced Settings

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N150 WiFi Router (N150R)

Note:

For enhanced security, restrict access to as few external IP

addresses as practical.

•

To allow access from a single IP address on the Internet, select

Only This

Computer

. Enter the IP address that will be allowed access.

•

To allow access from a range of IP addresses on the Internet, select

IP Address

Range

. Enter a beginning and ending IP address to define the allowed range.

•

To specify IP addresses, select

IP Address List

and type in the allowed IP

addresses.

•

To allow access from any IP address on the Internet, select

Everyone

.

4.

Specify the port number for accessing the management interface.

Normal web browser access uses the standard HTTP service port 80. For greater

security, enter a custom port number for the remote web management interface. Choose

a number from 1024 to 65535, but do not use the number of any common service port.

The default is 8080, which is a common alternate for HTTP.

5.

Click

Apply

to have your changes take effect.

6.

When accessing your router from the Internet, type your 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

in your browser.

Universal Plug and Play

Universal Plug and Play (UPnP) helps devices, such as Internet appliances and computers,

to access the network and connect to other devices as needed. UPnP devices can

automatically discover the services from other registered UPnP devices on the network.

If you use applications such as multiplayer gaming, peer-to-peer connections, or real-time

communications such as instant messaging or remote assistance (a feature in Windows XP),

you should enable UPnP.

Advanced Settings

72

N150 WiFi Router (N150R)



To turn on Universal Plug and Play:

1.

Select

Advanced > UPnP

. The UPnP screen displays.

2.

The available settings and information in this screen are:

Turn UPnP On

.

UPnP can be enabled or disabled for automatic device configuration.

The default setting for UPnP is disabled. If this check box is not selected, the router does

not allow any device to automatically control the resources, such as port forwarding

(mapping) of the router.

Advertisement Period

.

The advertisement period is how often the router broadcasts its

UPnP information. This value can range from 1 to 1440 minutes. The default period is 30

minutes. Shorter durations ensure that control points have current device status at the

expense of additional network traffic. Longer durations can compromise the freshness of

the device status, but can significantly reduce network traffic.

Advertisement Time to Live

.

The time to live for the advertisement is measured in hops

(steps) for each UPnP packet sent. The time to live hop count is the number of steps a

broadcast packet is allowed to propagate for each UPnP advertisement before it

disappears. The number of hops can range from 1 to 255. The default value for the

advertisement time to live is 4 hops, which is fine for most home networks. If you notice

that some devices are not being updated or reached correctly, then it might be necessary

to increase this value.

UPnP Portmap Table

.

The UPnP Portmap Table displays the IP address of each UPnP

device that is currently accessing the router and which ports (internal and external) that

device has opened. The UPnP Portmap Table also displays what type of port is open and

whether that port is still active for each IP address.

3.

Click

Apply

to save your settings.

73

7

7.

Troubleshooting

This chapter provides information about troubleshooting your N150 WiFi Router (N150R). After

each problem description, instructions are provided to help you diagnose and solve the problem.

As a first step, please review the Quick Tips.

Tip:

On Networks provides helpful articles, documentation, and the latest

software updates at

.

This chapter contains the following sections:

•

Quick Tips

•

Troubleshooting with the LEDs

•

Cannot Log In to the Router

•

Cannot Access the Internet

•

Changes Not Saved

•

Wireless Connectivity

•

Restore the Factory Settings and Password

•

Troubleshoot Your Network Using the Ping Utility

Troubleshooting

74

N150 WiFi Router (N150R)

Quick Tips

This section describes tips for troubleshooting some common problems

Sequence to Restart Your Network

Be sure to restart your network in this sequence:

1.

Turn off

and

unplug the modem.

2.

Turn off the router and computers.

3.

Plug in the modem and turn it on. Wait 2 minutes.

4.

Turn on the router and wait 2 minutes.

5.

Turn on the computers.

Check Ethernet Cable Connections

Make sure that the Ethernet cables are securely plugged in.

•

The Internet LED on the router is on if the Ethernet cable connecting the router and the

modem is plugged in securely and the modem and router are turned on.

•

For each powered-on computer connected to the router by an Ethernet cable, the

corresponding numbered router LAN port LED is on.

Wireless Settings

Make sure that the wireless settings in the computer and router match exactly.

•

For a wirelessly connected computer, the wireless network name (SSID) and wireless

security settings of the router and wireless computer need to match exactly.

•

If you set up an access list in the Advanced Wireless Settings screen, you have to 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 need to have 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

75

N150 WiFi Router (N150R)

Troubleshooting with the LEDs

After you turn on power to the router, the following sequence of events should occur:

1.

When power is first applied, verify that the Power/Test LED is on.

2.

Verify that the Power/Test LED starts blinkiing green, indicating that the self-test is running.

3.

After approximately 30 seconds, verify the following:

•

The Power/Test LED is solid green.

•

The Internet LED is on.

•

A numbered Ethernet port LED is on for any local port that is connected to a

computer. This indicates that a link has been established to the connected device.

The LEDs on the front panel of the router can be used for troubleshooting.

Power/Test LED Is Off

•

Make sure that the power cord is securely connected to your router and that the power

adapter is securely connected to a functioning power outlet.

•

Check that you are using the power adapter that came in the package for this product.

•

If the Power/Test 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, you have a hardware problem. For recovery

instructions, or help with a hardware problem, contact technical support at

.

.

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 could be a standard

straight-through Ethernet cable or an Ethernet crossover cable.