50

Appendix A: Troubleshooting

Common Problems and Solutions

Wireless-G Broadband Router with 2 Phone Ports

8.

I am not able to access the Router’s Web-based Utility Setup page.

A.

Refer to “Problem #6, I want to test my Internet connection” to verify that your computer is properly

connected to the Router.

B.

Refer to “Appendix D: Finding the MAC Address and IP Address for Your Ethernet Adapter” to verify that

your computer has an IP Address, Subnet Mask, Gateway, and DNS.

C.

Set a static IP address on your system; refer to “Problem #5: I need to set a static IP address on a PC.”

D.

Refer to “Problem #14: I am a PPPoE user, and I need to remove the proxy settings or the dial-up pop-up

window.”

9.

I can’t get my Virtual Private Network (VPN) to work through the Router.

Access the Router’s web interface by going to

or the IP address of the Router, and go to

the

Security

=>

VPN

tab.

Make sure you have IPsec passthrough and/or PPTP passthrough 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 Router; 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 Router.

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

Change the IP address for the Router 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 192.168.15.X (X is a number from

1 to 254) and your local LAN IP address is 192.168.15.X (X is the same number used in the VPN IP address),

the Router will have difficulties routing information to the right location.

If you change the Router’s IP address

to 192.168.2.1, that should solve the problem. Change the Router’s IP address through the Basic Setup tab of

the Web-based Utility.

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 #11, I need to set up online game hosting or use other Internet applications” for

details. Check the Linksys website at

www.linksys.com

for more information.

10.I need to set up a server behind my Router.

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 Router’s Web-based Utility. We will be setting up web, ftp, and mail servers.

51

Appendix A: Troubleshooting

Common Problems and Solutions

Wireless-G Broadband Router with 2 Phone Ports

A.

Access the Router’s Web-based Utility by going to

or the IP address of the Router. Go

to the

Applications & Gaming

=>

Port Range Forward

tab.

B.

Enter any name you want to use for the Application.

C.

Enter the port range of the service you are using. For example, if you have a web server, you would enter

the range 80 to 80.

D.

Select the protocol you will be using,

TCP

or

UDP

, or select

Both

.

E.

Enter the IP address of the PC or network device that you want the port server to go to. For example, if the

web server’s Ethernet adapter IP address is 192.168.15.100, you would enter 100 in the field provided.

Check “Appendix D: Finding the MAC Address and IP Address for Your Ethernet Adapter” for details on

getting an IP address.

F.

Check the

Enable

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

When you have completed the configuration, click the

Save Settings

button.

11.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 Router 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:

A.

Access the Router’s Web-based Utility by going to

or the IP address of the Router. Go

to the

Applications & Gaming

=>

Port Range Forward

tab.

B.

Enter any name you want to use for the Application.

C.

Enter the port range of the service you are using. For example, if you have a web server, you would enter

the range 80 to 80.

D.

Select the protocol you will be using,

TCP

or

UDP

, or select

Both

.

E.

Enter the IP address of the PC or network device that you want the port server to go to. For example, if the

web server’s Ethernet adapter IP address is 192.168.15.100, you would enter 100 in the field provided.

Application

Start and End

Protocol

IP Address

Enable

Web server

80 to 80

Both

192.168.15.100

X

FTP server

21 to 21

TCP

192.168.15.101

X

SMTP (outgoing)

25 to 25

Both

192.168.15.102

X

POP3 (incoming)

110 to 110

Both

192.168.15.102

X

52

Appendix A: Troubleshooting

Common Problems and Solutions

Wireless-G Broadband Router with 2 Phone Ports

Check “Appendix D: Finding the MAC Address and IP Address for Your Ethernet Adapter” for details on

getting an IP address.

F.

Check the

Enable

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

When you have completed the configuration, click the

Save Settings

button.

12.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 PC 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 Router will be checked first by the forwarding

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

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

Follow these steps to set DMZ hosting:

A.

Access the Router’s Web-based Utility by going to

or the IP address of the Router. Go

to the

Applications & Gaming

=>

Port Range Forward

tab.

B.

Disable or remove the entries you have entered for forwarding. Keep this information in case you want to

use it at a later time.

C.

Click the

DMZ

tab.

D.

Enter the Ethernet adapter’s IP address of the computer you want exposed to the Internet.

This will

bypass the NAT security for that computer. Please refer to “Appendix D: Finding the MAC Address and IP

Address for Your Ethernet Adapter” for details on getting an IP address.

Once completed with the configuration, click the

Save Settings

button.

13.I forgot my password, or the password prompt always appears when saving settings to the Router.

Reset the Router to factory default by pressing the Reset button for 30 seconds and then releasing it. If you

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

Application

Start and End

Protocol

IP Address

Enable

UT

7777 to 27900

Both

192.168.15.100

X

Halflife

27015 to 27015

Both

192.168.15.105

X

PC Anywhere

5631 to 5631

UDP

192.168.15.102

X

VPN IPSEC

500 to 500

UDP

192.168.15.100

X

53

Appendix A: Troubleshooting

Common Problems and Solutions

Wireless-G Broadband Router with 2 Phone Ports

A.

Access the Router’s web interface by going to

or the IP address of the Router. Enter

the default password

admin

, and click the

Administration

=>

Management

tab.

B.

Enter a different password in the

Router Password

field, and enter the same password in the second field

to confirm the password.

C.

Click the

Save Settings

button.

14.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 Router 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:

A.

Click

Start

,

Settings

, and

Control Panel

. Double-click

Internet Options

.

B.

Click the

Connections

tab.

C.

Click the

LAN settings

button and remove anything that is checked.

D.

Click the

OK

button to go back to the previous screen.

E.

Click the option

Never dial a connection

.

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

For Netscape 4.7 or higher:

A.

Start

Netscape Navigator

, and click

Edit

,

Preferences

,

Advanced

, and

Proxies

.

B.

Make sure you have

Direct connection to the Internet

selected on this screen.

C.

Close all the windows to finish.

15.To start over, I need to set the Router to factory default.

Hold the Reset button for up to 30 seconds and then release it. This will return the password, forwarding, and

other settings on the Router to the factory default settings. In other words, the Router will revert to its original

factory configuration.

16.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.

A.

To connect to the Router, go to the web browser, and enter

or the IP address of the

Router.

B.

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

C.

On the

Basic Setup

tab, select the option

Keep Alive

, and set the

Redial Period

option at

20

(seconds).

54

Appendix A: Troubleshooting

Common Problems and Solutions

Wireless-G Broadband Router with 2 Phone Ports

D.

Click the

Save Settings

button.

E.

Click the

Status

tab, and click the

Connect

button.

F.

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.

If the connection is lost again, follow steps E and F to re-establish connection.

17.I can't access my email, 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 at 1500.

For most DSL users, it is strongly recommended to use MTU 1492.

If you are having some difficulties,

perform the following steps:

A.

Open the web browser, and enter

or the IP address of the Router.

B.

Enter the password, if asked. (The default password is

admin

.)

C.

On the

Basic Setup

tab, look for the MTU option, and select

Manual

. In the

Size

field, enter 1492.

D.

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

18.I need to use port triggering.

Port triggering looks at the outgoing port services used and will trigger the Router to open a specific port,

depending on which port an Internet application uses.

Follow these steps:

A.

To connect to the Router, go to the web browser, and enter

or the IP address of the

Router.

B.

Enter the password, if asked. (The default password is

admin

.)

C.

Click the

Applications & Gaming

=>

Port Trigger

tab.

D.

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

E.

Enter the Start and End Ports of the Triggered Port Range. Check with your Internet application provider

for more information on which outgoing port services it is using.

F.

Enter the Start and End Ports of the Forwarded Port Range. Check with your Internet application provider

for more information on which incoming port services are required by the Internet application.

G.

Check the

Enable

option for the port services you want to use.

When you have completed the configuration, click the

Save Settings

button.