Zyxel NBG4604 Router Manual PDF (Setup & Configuration Guide)

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Chapter 23 Troubleshooting

NBG4604 User’s Guide

196

3

Inspect your cables for damage. Contact the vendor to replace any damaged

cables.

4

Disconnect and re-connect the power adaptor to the NBG4604.

5

If the problem continues, contact the vendor.

23.2

NBG4604 Access and Login

I don’t know the IP address of my NBG4604.

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 NBG4604 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 NBG4604 (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 NBG4604’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 NBG4604 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 NBG4604 to change all settings back to their default. This means your

current settings are lost. See

Section 23.4 on page 199

in the

Troubleshooting

for information on resetting your NBG4604.

I forgot the password.

1

The default password is

1234

.

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2

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

Section 23.4 on page 199

.

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 4.4.1 on page 54

), 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 NBG4604.

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

JavaScript and Java enabled. See

Appendix B on page 213

.

4

Make sure your computer is in the same subnet as the NBG4604. (If you know

that there are routers between your computer and the NBG4604, skip this step.)

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

a dynamic IP address. See

Section 4.4.1 on page 54

.

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

address is in the same subnet as the NBG4604. See

Section 4.4.1 on page 54

.

5

Reset the device to its factory defaults, and try to access the NBG4604 with the

default IP address.

6

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

of the advanced suggestions.

Advanced Suggestions

•

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 NBG4604.

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.

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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 NBG4604.

4

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

Section 23.4 on page 199

.

23.3

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.

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 NBG4604 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

NBG4604), but my Internet connection is not available anymore.

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199

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 17

.

2

Reboot the NBG4604.

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 17

. If the NBG4604 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 NBG4604

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 NBG4604.

4

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

of the advanced suggestions.

Advanced Suggestion

•

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

23.4

Resetting the NBG4604 to Its Factory

Defaults

If you reset the NBG4604, you lose all of the changes you have made. The

NBG4604 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 NBG4604,

1

Make sure the power LED is on.

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Chapter 23 Troubleshooting

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200

2

Press the

RESET

button for longer than 1 second to restart/reboot the NBG4604.

3

Press the

RESET

button for longer than five seconds to set the NBG4604 back to

its factory-default configurations.

If the NBG4604 restarts automatically, wait for the NBG4604 to finish restarting,

and log in to the Web Configurator. The password is “1234”.

If the NBG4604 does not restart automatically,

di

sconnect and reconnect the

NBG4604’s power. Then, follow the directions above again.

23.5

Wireless Router/AP Troubleshooting

I cannot access the NBG4604 or ping any computer from the WLAN (wireless AP

or router).

1

Make sure the wireless LAN is enabled on the NBG4604

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 NBG4604.

4

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

transmission range of the NBG4604.

5

Check that both the NBG4604 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 NBG4604.

7

Make sure you allow the NBG4604 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.

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