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Appendix A: Troubleshooting

Common Problems and Solutions

Wireless-G ADSL Home Gateway

3.

Refer to “Problem #10: I am a PPPoE user, and I need to remove the proxy settings or the dial-up pop-

up window.”

5.

I can’t get my Virtual Private Network (VPN) working through the Gateway.

Access the Gateway’s web interface by going to http://192.168.1.1 or the IP address of the Gateway, and go

to the Security tab.

Make sure you have IPsec passthrough and/or PPTP pass-through enabled.

•

VPNs that use IPSec with the ESP (Encapsulation Security Payload known as protocol 50) authentication

will work fine. At least one IPSec session will work through the Gateway; however, simultaneous IPSec

sessions may be possible, depending on the specifics of your VPNs.

•

VPNs that use IPSec and AH (Authentication Header known as protocol 51) are incompatible with the

Gateway.

AH has limitations due to occasional incompatibility with the NAT standard.

•

Change the IP address for the Gateway to another subnet to avoid a conflict between the VPN IP address

and your local IP address. For example, if your VPN server assigns an IP address 192.168.1.X (X is a

number from 1 to 254) and your local LAN IP address is 192.168.1.X (X is the same number used in the

VPN IP address), the Gateway will have difficulties routing information to the right location.

If you change

the Gateway’s IP address to 192.168.2.1, that should solve the problem. Change the Gateway’s IP address

through the Setup tab of the web interface.

•

If you assigned a static IP address to any computer or network device on the network, you need to change

its IP address accordingly to 192.168.2.Y (Y being any number from 1 to 254). Note that each IP address

must be unique within the network.

•

Your VPN may require port 500/UDP packets to be passed to the computer that is connecting to the IPSec

server. Refer to “Problem #7, I need to set up online game hosting or use other Internet applications” for

details.

•

Check the Linksys international website for more information at www.linksys.com/international.

6.

I need to set up a server behind my Gateway and make it available to the public.

To use a server like a web, ftp, or mail server, you need to know the respective port numbers they are using.

For example, port 80 (HTTP) is used for web; port 21 (FTP) is used for FTP, and port 25 (SMTP outgoing) and

port 110 (POP3 incoming) are used for the mail server.

You can get more information by viewing the

documentation provided with the server you installed.

•

Follow these steps to set up port forwarding through the Gateway’s web-based utility. We will be setting

up web, ftp, and mail servers.

1.

Access the Gateway’s web-based utility by going to http://192.168.1.1 or the IP address of the

Gateway. Go to the Applications and Gaming => Port Range Forwarding tab.

2.

Enter any name you want to use for the Customized Application.

3.

Enter the External Port range of the service you are using. For example, if you have a web server, you

would enter the range 80 to 80.

4.

Check the protocol you will be using, TCP and/or UDP.

5.

Enter the IP address of the computer or network device that you want the port server to go to. For

example, if the web server’s Ethernet adapter IP address is 192.168.1.100, you would enter 100 in the

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Appendix A: Troubleshooting

Common Problems and Solutions

Wireless-G ADSL Home Gateway

field provided. Check “Appendix C: Finding the MAC Address and IP Address for Your Ethernet

Adapter” for details on getting an IP address.

6.

Check the Enable option for the port services you want to use. Consider the example below:

Customized Application

External Port

TCP

UDP

IP Address

Enable

Web server

80 to 80

X

192.168.1.100

X

FTP server

21 to 21

X

192.168.1.101

X

SMTP (outgoing)

25 to 25

X

192.168.1.102

X

POP3 (incoming)

110 to 110

X

192.168.1.102

X

When you have completed the configuration, click the

Save Settings

button.

7.

I need to set up online game hosting or use other Internet applications.

If you want to play online games or use Internet applications, most will work without doing any port

forwarding or DMZ hosting.

There may be cases when you want to host an online game or Internet

application. This would require you to set up the Gateway to deliver incoming packets or data to a specific

computer.

This also applies to the Internet applications you are using. The best way to get the information on

what port services to use is to go to the website of the online game or application you want to use. Follow

these steps to set up online game hosting or use a certain Internet application:

1.

Access the Gateway’s web interface by going to http://192.168.1.1 or the IP address of the Gateway.

Go to the Applications and Gaming => Port Range Forwarding tab.

2.

Enter any name you want to use for the Customized Application.

3.

Enter the External Port range of the service you are using. For example, if you want to host Unreal

Tournament (UT), you would enter the range 7777 to 27900.

4.

Check the protocol you will be using, TCP and/or UDP.

5.

Enter the IP address of the computer or network device that you want the port server to go to. For

example, if the web server’s Ethernet adapter IP address is 192.168.1.100, you would enter 100 in the

field provided. Check “Appendix C: Finding the MAC Address and IP Address for Your Ethernet

Adapter” for details on getting an IP address.

6.

Check the

Enable

option for the port services you want to use. Consider the example below:

Customized Application

External Port

TCP

UDP

IP Address

Enable

UT

7777 to 27900

X

X

192.168.1.100

X

Halflife

27015 to 27015

X

X

192.168.1.105

X

PC Anywhere

5631 to 5631

X

192.168.1.102

X

VPN IPSEC

500 to 500

X

192.168.1.100

X

When you have completed the configuration, click the

Save Settings

button.

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Appendix A: Troubleshooting

Common Problems and Solutions

Wireless-G ADSL Home Gateway

8.

I can’t get the Internet game, server, or application to work.

If you are having difficulties getting any Internet game, server, or application to function properly, consider

exposing one computer to the Internet using DeMilitarized Zone (DMZ) hosting. This option is available when

an application requires too many ports or when you are not sure which port services to use. Make sure you

disable all the forwarding entries if you want to successfully use DMZ hosting, since forwarding has priority

over DMZ hosting. (In other words, data that enters the Gateway will be checked first by the forwarding

settings. If the port number that the data enters from does not have port forwarding, then the Gateway will

send the data to whichever computer or network device you set for DMZ hosting.)

•

Follow these steps to set DMZ hosting:

1.

Access the Gateway’s web-based utility by going to http://192.168.1.1 or the IP address of the

Gateway. Go to the Applications and Gaming => DMZ tab. Click Enabled and enter the IP of the

computer.

2.

Check the Port Forwarding pages and disable or remove the entries you have entered for forwarding.

Keep this information in case you want to use it at a later time.

•

Once completed with the configuration, click the

Save Settings

button.

9.

I forgot my password, or the password prompt always appears when I am saving settings to the

Gateway.

•

Reset the Gateway to factory default by pressing the Reset button for 10 seconds and then releasing it. If

you are still getting prompted for a password when saving settings, then perform the following steps:

1.

Access the Gateway’s web-based utility by going to http://192.168.1.1 or the IP address of the

Gateway. Enter the default username and password

admin

, and click the

Administrations

=>

Management

tab.

2.

Enter a different password in the Gateway Password field, and enter the same password in the

second field to confirm the password.

3.

Click the

Save Settings

button.

10.I am a PPPoE user, and I need to remove the proxy settings or the dial-up pop-up window.

If you have proxy settings, you need to disable these on your computer. Because the Gateway is the gateway

for the Internet connection, the computer does not need any proxy settings to gain access.

Please follow

these directions to verify that you do not have any proxy settings and that the browser you use is set to

connect directly to the LAN.

•

For Microsoft Internet Explorer 5.0 or higher:

1.

Click

Start,

Settings

, and

Control Panel

. Double-click Internet Options.

2.

Click the

Connections

tab.

3.

Click the

LAN settings

button and remove anything that is checked.

4.

Click the

OK

button to go back to the previous screen.

5.

Click the option

Never dial a connection

.

This will remove any dial-up pop-ups for PPPoE users.

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Appendix A: Troubleshooting

Common Problems and Solutions

Wireless-G ADSL Home Gateway

•

For Netscape 6 or higher:

1.

Start

Netscape Navigator

, and click

Edit

,

Preferences

,

Advanced

, and

Proxies

.

2.

Make sure you have Direct connection to the Internet selected on this screen.

3.

Close all the windows to finish.

11.To start over, I need to set the Gateway to factory default.

Hold the

Reset

button for 10 seconds and then release it. This will return the Internet settings, password,

forwarding, and other settings on the Gateway to the factory default settings. In other words, the Gateway will

revert to its original factory configuration.

12.I need to upgrade the firmware.

In order to upgrade the firmware with the latest features, you need to go to the Linksys international website

and download the latest firmware at www.linksys.com/international.

•

Follow these steps:

1.

Go to the Linksys international website at http://www.linksys.com/international and select your

region or country.

2.

Click the

Products

tab and select the Gateway.

3.

On the Gateway’s webpage, click

Firmware

, and then download the latest firmware for the Gateway.

4.

To upgrade the firmware, follow the steps in the Administration section found in “Chapter 5:

Configuring the Wireless-G ADSL Home Gateway.”

13.The firmware upgrade failed, and/or the Power LED is flashing.

The upgrade could have failed for a number of reasons.

Follow these steps to upgrade the firmware and/or

make the Power LED stop flashing:

•

If the firmware upgrade failed, use the TFTP program (it was downloaded along with the firmware). Open

the pdf that was downloaded along with the firmware and TFTP program, and follow the pdf’s

instructions.

•

Set a static IP address on the computer; refer to “Problem #1, I need to set a static IP address.” Use the

following IP address settings for the computer you are using:

IP Address: 192.168.1.50

Subnet Mask: 255.255.255.0

Gateway: 192.168.1.1

•

Perform the upgrade using the TFTP program or the Gateway’s web-based utility through its

Administration tab.

14.My DSL service’s PPPoE is always disconnecting.

PPPoE is not actually a dedicated or always-on connection.

The DSL ISP can disconnect the service after a

period of inactivity, just like a normal phone dial-up connection to the Internet.

•

There is a setup option to “keep alive” the connection.

This may not always work, so you may need to re-

establish connection periodically.

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Appendix A: Troubleshooting

Common Problems and Solutions

Wireless-G ADSL Home Gateway

1.

To connect to the Gateway, go to the web browser, and enter http://192.168.1.1 or the IP address of

the Gateway.

2.

Enter the username and password, if asked. (The default username and password is admin.)

3.

On the Setup screen, select the option

Keep Alive

, and set the Redial Period option at 20 (seconds).

4.

Click the

Save Settings

button. Click the

Status

tab, and click the

Connect

button.

5.

You may see the login status display as Connecting. Press the F5 key to refresh the screen, until you

see the login status display as Connected.

6.

Click the

Save Settings

button to continue.

•

If the connection is lost again, follow steps 1- 6 to re-establish connection.

15.I can’t access my e-mail, web, or VPN, or I am getting corrupted data from the Internet.

The Maximum Transmission Unit (MTU) setting may need to be adjusted. By default, the MTU is set

automatically.

•

If you are having some difficulties, perform the following steps:

1.

To connect to the Gateway, go to the web browser, and enter http://192.168.1.1 or the IP address of

the Gateway.

2.

Enter the username and password, if asked. (The default username and password is admin.)

3.

Look for the MTU option, and select

Manual

. In the Size field, enter 1492.

4.

Click the

Save Settings

button to continue.

•

If your difficulties continue, change the Size to different values. Try this list of values, one value at a time,

in this order, until your problem is solved:

1462

1400

1362

1300

16.The Power LED flashes continuously.

The Power LED lights up when the device is first powered up. In the meantime, the system will boot up itself

and check for proper operation. After finishing the checking procedure, the LED remains steady to show that

the system is working fine. If the LED continues to flash after this time, the device is not working properly. Try

to flash the firmware by assigning a static IP address to the computer, and then upgrade the firmware. Try

using the following settings, IP Address: 192.168.1.50 and Subnet Mask: 255.255.255.0.

17.When I enter a URL or IP address, I get a time-out error or am prompted to retry.

•

Check if other computers work. If they do, ensure that your computer’s IP settings are correct (IP Address,

Subnet Mask, Default Gateway, and DNS). Restart the computer that is having a problem.

•

If the computers are configured correctly, but still not working, check the

Gateway. Ensure that it is

connected and powered on. Connect to it and check its settings. (If you cannot connect to it, check the

LAN and power connections.)