Zyxel NBG-419N Router Manual PDF (Setup & Configuration Guide)

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Chapter 31 Troubleshooting

NBG-419N User’s Guide

186

31.2

NBG-419N Access and Login

I don’t know the IP address of my NBG-419N.

1

The default IP address is

192.168.1.1

.

2

If you changed the IP address and have forgotten it, you might get the IP address of the NBG-419N

by looking up the IP address of the default gateway for your computer. To do this in most Windows

computers, click

Start > Run

, enter

cmd

, and then enter

ipconfig

. The IP address of the

Default

Gateway

might be the IP address of the NBG-419N (it depends on the network), so enter this IP

address in your Internet browser.Set your device to

Router Mode

, login (see the Quick Start Guide

for instructions) and go to the

Device Information

table in the

Status

screen. Your NBG-419N’s

IP address is available in the

Device Information

table.

•

If the

DHCP

setting under

LAN information

is

None

, your device has a fixed IP address.

•

If the

DHCP

setting under

LAN information

is

Client

, then your device receives an IP

address from a DHCP server on the network.

3

If your NBG-419N is a DHCP client, you can find your IP address from the DHCP server. This

information is only available from the DHCP server which allocates IP addresses on your network.

Find this information directly from the DHCP server or contact your system administrator for more

information.

4

Reset your NBG-419N to change all settings back to their default. This means your current settings

are lost. See

Section 31.4 on page 189

in the

Troubleshooting

for information on resetting your

NBG-419N.

I forgot the password.

1

The default password is

1234

.

2

If this does not work, you have to reset the device to its factory defaults. See

Section 31.4 on page

189

.

I cannot see or access the

Login

screen in the Web Configurator.

1

Make sure you are using the correct IP address.

•

The default IP address is

192.168.1.1

.

•

If you changed the IP address (

Section 13.4 on page 123

), use the new IP address.

•

If you changed the IP address and have forgotten it, see the troubleshooting suggestions for

I

don’t know the IP address of my NBG-419N.

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Chapter 31 Troubleshooting

NBG-419N User’s Guide

187

2

Check the hardware connections, and make sure the LEDs are behaving as expected. See the Quick

Start Guide.

3

Make sure your Internet browser does not block pop-up windows and has JavaScripts and Java

enabled. See

Appendix A on page 195

.

4

Make sure your computer is in the same subnet as the NBG-419N. (If you know that there are

routers between your computer and the NBG-419N, skip this step.)

•

If there is a DHCP server on your network, make sure your computer is using a dynamic IP

address. See

Appendix C on page 217

.

•

If there is no DHCP server on your network, make sure your computer’s IP address is in the

same subnet as the NBG-419N. See

Appendix C on page 217

.

5

Reset the device to its factory defaults, and try to access the NBG-419N with the default IP address.

See

Section 3.3 on page 37

.

6

If the problem continues, contact the network administrator or vendor, or try one of the advanced

suggestions.

Advanced Suggestion

•

If your computer is connected to the

WAN

port or is connected wirelessly, use a computer that is

connected to a

LAN

/

ETHERNET

port.

I can see the

Login

screen, but I cannot log in to the NBG-419N.

1

Make sure you have entered the password correctly. The default password is

1234

. This field is

case-sensitive, so make sure [Caps Lock] is not on.

2

This can happen when you fail to log out properly from your last session. Try logging in again after

5 minutes.

3

Disconnect and re-connect the power adaptor or cord to the NBG-419N.

4

If this does not work, you have to reset the device to its factory defaults. See

Section 31.4 on page

189

.

31.3

Internet Access

I cannot access the Internet.

1

Check the hardware connections, and make sure the LEDs are behaving as expected. See the Quick

Start Guide.

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Chapter 31 Troubleshooting

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188

2

Make sure you entered your ISP account information correctly in the wizard. These fields are case-

sensitive, so make sure [Caps Lock] is not on.

3

If you are trying to access the Internet wirelessly, make sure the wireless settings in the wireless

client are the same as the settings in the AP.

•

Go to Network > Wireless LAN > General > WDS and check if the NBG-419N is set to bridge

mode. Select

Disable

and try to connect to the Internet again.

4

Disconnect all the cables from your device, and follow the directions in the Quick Start Guide again.

5

Go to Maintenance > Sys OP Mode > General. Check your System Operation Mode setting.

• Select

Router

if your device routes traffic between a local network and another network such

as the Internet.

• Select

Access Point

if your device bridges traffic between clients on the same network.

6

If the problem continues, contact your ISP.

I cannot access the Internet anymore. I had access to the Internet (with the NBG-419N), but

my Internet connection is not available anymore.

1

Check the hardware connections, and make sure the LEDs are behaving as expected. See the Quick

Start Guide and

Section 1.5 on page 20

.

2

Reboot the NBG-419N.

3

If the problem continues, contact your ISP.

The Internet connection is slow or intermittent.

1

There might be a lot of traffic on the network. Look at the LEDs, and check

Section 1.5 on page 20

.

If the NBG-419N is sending or receiving a lot of information, try closing some programs that use

the Internet, especially peer-to-peer applications.

2

Check the signal strength. If the signal strength is low, try moving the NBG-419N closer to the AP if

possible, and look around to see if there are any devices that might be interfering with the wireless

network (for example, microwaves, other wireless networks, and so on).

3

Reboot the NBG-419N.

4

If the problem continues, contact the network administrator or vendor, or try one of the advanced

suggestions.

Advanced Suggestions

•

Check the settings for bandwidth management. If it is disabled, you might consider activating it.

If it is enabled, you might consider changing the allocations.

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Chapter 31 Troubleshooting

NBG-419N User’s Guide

189

•

Check the settings for QoS. If it is disabled, you might consider activating it. If it is enabled, you

might consider raising or lowering the priority for some applications.

31.4

Resetting the NBG-419N to Its Factory Defaults

If you reset the NBG-419N, you lose all of the changes you have made. The NBG-419N re-loads its

default settings, and the password resets to

1234

. You have to make all of your changes again.

You will lose all of your changes when you push the

RESET

button.

To reset the NBG-419N,

1

Make sure the power LED is on.

2

Press the

RESET

button for longer than 1 second to restart/reboot the NBG-419N.

3

Press the

RESET

button for longer than five seconds to set the NBG-419N back to its factory-

default configurations.

If the NBG-419N restarts automatically, wait for the NBG-419N to finish restarting, and log in to the

Web Configurator. The password is “1234”.

If the NBG-419N does not restart automatically,

di

sconnect and reconnect the NBG-419N’s power.

Then, follow the directions above again.

31.5

Wireless Router/AP Troubleshooting

I cannot access the NBG-419N or ping any computer from the WLAN (wireless AP or router).

1

Make sure the wireless LAN is enabled on the NBG-419N

2

Make sure the wireless adapter on the wireless station is working properly.

3

Make sure the wireless adapter installed on your computer is IEEE 802.11 compatible and supports

the same wireless standard as the NBG-419N.

4

Make sure your computer (with a wireless adapter installed) is within the transmission range of the

NBG-419N.

5

Check that both the NBG-419N and your wireless station are using the same wireless and wireless

security settings.

6

Make sure traffic between the WLAN and the LAN is not blocked by the firewall on the NBG-419N.

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Chapter 31 Troubleshooting

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7

Make sure you allow the NBG-419N to be remotely accessed through the WLAN interface. Check

your remote management settings.

•

See the chapter on Wireless LAN in the User’s Guide for more information.

to select Router Mode.

I set up URL keyword blocking, but I can still access a website that should be blocked.

Make sure that you select the

Enable URL Keyword Blocking

check box in the Content Filtering

screen. Make sure that the keywords that you type are listed in the

Keyword List

.

If a keyword that is listed in the

Keyword List

is not blocked when it is found in a URL, customize

the keyword blocking using commands. See the Customizing Keyword Blocking URL Checking

section in the Content Filter chapter.

I can access the Internet, but I cannot open my network folders.

In the Network > LAN > Advanced

screen, make sure

Allow between LAN and WAN

is checked.

This is not checked by default to keep the LAN secure.

If you still cannot access a network folder, make sure your account has access rights to the folder

you are trying to open.

I can access the Web Configurator after I switched to AP mode.

When you change from router mode to AP mode, your computer must have an IP address in the

range between “192.168.1.3” and “192.168.1.254”.

Refer to

Appendix C on page 217

for instructions on how to change your computer’s IP address.

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