Linksys RV042 Router Manual PDF (Setup & Configuration Guide)

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67

Appendix A: Troubleshooting

Common Problems and Solutions

10/100 4-Port VPN Router

2.

I want to test my Internet connection.

A.

Check your TCP/IP settings.

For Windows 98 and Millennium:

Refer to Windows Help and “Chapter 5: Configuring the PCs” for details. Make sure

Obtain IP address

automatically

is selected in the settings.

For Windows 2000:

1.

Click

Start

,

Settings

, and

Control Panel

. Double-click

Network and Dial-Up Connections

.

2.

Right-click the

Local Area Connection

that is associated with the Ethernet adapter you are using,

and select the

Properties

option.

3.

In the

Components checked are used by this connection

box, highlight

Internet Protocol (TCP/IP)

,

and click the

Properties

button. Make sure that

Obtain an IP address automatically

and

Obtain

DNS server address automatically

are selected.

4.

Click the

OK

button in the

Internet Protocol (TCP/IP) Properties

window, and click the

OK

button in the

Local Area Connection Properties

window.

5.

Restart the computer if asked.

6.

Click the

OK

button in the

Internet Protocol (TCP/IP) Properties

window, and click the

OK

button in the

Local Area Connection Properties

window.

7.

Restart the computer if asked.

For Windows XP:

The following instructions assume you are running Windows XP with the default interface. If you are using the

Classic interface (where the icons and menus look like previous Windows versions), please follow the

instructions for Windows 2000.

1.

Click

Start

and

Control Panel

.

2.

Click the

Network and Internet Connections

icon and then the

Network Connections

icon.

3.

Right-click the

Local Area Connection

that is associated with the Ethernet adapter you are using,

and select the

Properties

option.

4.

In the

This connection uses the following items

box, highlight

Internet Protocol (TCP/IP)

, and click

the

Properties

button.

Make sure that

Obtain an IP address automatically

and

Obtain DNS server

address automatically

are selected.

B.

Open a command prompt.

•

For Windows 98 and Millennium, click

Start

and

Run

. In the

Open

field, type

command

. Press the

Enter

key or click the

OK

button.

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68

Appendix A: Troubleshooting

Common Problems and Solutions

10/100 4-Port VPN Router

•

For Windows 2000 and XP, click

Start

and

Run

. In the

Open

field, type

cmd

. Press the

Enter

key or

click the

OK

button.

C.

In the command prompt, type

ping 192.168.1.1

and press the

Enter

key.

•

If you get a reply, the computer is communicating with the Router.

•

If you do NOT get a reply, check the cable, and make sure

Obtain an IP address automatically

is

selected in the TCP/IP settings for your Ethernet adapter.

D.

In the command prompt, type

ping

followed by your Internet IP address and press the

Enter

key.

The

Internet IP Address can be found in the web interface of the Router. For example, if your Internet IP

address is 1.2.3.4, you would enter

ping 1.2.3.4

and press the

Enter

key.

•

If you get a reply, the computer is connected to the Router.

•

If you do NOT get a reply, try the ping command from a different computer to verify that your original

computer is not the cause of the problem.

E.

In the command prompt, type

ping www.linksys.com

and press the

Enter

key.

•

If you get a reply, the computer is connected to the Internet. If you cannot open a webpage, try the

ping command from a different computer to verify that your original computer is not the cause of the

problem.

•

If you do NOT get a reply, there may be a problem with the connection. Try the ping command from a

different computer to verify that your original computer is not the cause of the problem.

3.

I am not getting an IP address on the Internet with my Internet connection.

A.

Refer to “Problem #2, I want to test my Internet connection” to verify that you have connectivity.

B.

If you need to register the MAC address of your Ethernet adapter with your ISP, please see “Appendix C:

Finding the MAC Address and IP Address for Your Ethernet Adapter.” If you need to clone the MAC address

of your Ethernet adapter onto the Router, see the MAC Address Clone section of “Chapter 7: Using the

Router’s Web-based Utility” for details.

C.

Make sure you are using the right Internet settings. Contact your ISP to see if your Internet connection

type is DHCP, Static IP Address, or PPPoE (commonly used by DSL consumers).

Please refer to the Basic

Setup section of “Chapter 7: Using the Router’s Web-based Utility” for details on Internet Connection Type

settings.

D.

Make sure you use the right cable. Check to see if the Internet LED is solidly lit.

E.

Make sure the cable connecting from your cable or DSL modem is connected to the Router’s Internet port.

Verify that the Status page of the Router’s Web-based Utility shows a valid IP address from your ISP.

F.

Turn off the computer, Router, and cable/DSL modem. Wait 30 seconds, and then turn on the Router,

cable/DSL modem, and computer. Check the Status tab of the Router’s Web-based Utility to see if you get

an IP address.

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69

Appendix A: Troubleshooting

Common Problems and Solutions

10/100 4-Port VPN Router

4.

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

A.

Refer to “Problem #2, I want to test my Internet connection” to verify that your computer is properly

connected to the Router.

B.

Refer to “Appendix C: 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 #1: I need to set a static IP address.”

D.

Refer to “Problem #10: I need to remove the proxy settings or the dial-up pop-up window (for PPPoE

users).”

5.

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

Access the Router’s web interface by going to

http://192.168.1.1

or the IP address of the Router, and go to

the

VPN

=>

VPN Pass Through

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 192.168.1.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

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 #7, 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.

6.

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

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70

Appendix A: Troubleshooting

Common Problems and Solutions

10/100 4-Port VPN Router

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.

A.

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

http://192.168.1.1

or the IP address of the Router. Go

to the

Setup

=>

Forwarding

tab.

B.

Select the Service from the pull-down menu. If the Service you need is not listed in the menu, click the

Service Management

button to add the new Service Name, and enter the Protocol and Port Range. Click

the

Add to List

button. Then click the

Save Setting

button. Click the

Exit

button.

C.

Enter the IP Address of the server that you want the Internet users to access. 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. Then check the

Enable

checkbox for the entry. Consider the examples below:

D.

Click the

Add to List

button, and configure as many entries as you like.

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 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

http://192.168.1.1

or the IP address of the Router. Go

to the

Setup

=>

Forwarding

tab.

B.

Select the Service from the pull-down menu. If the Service you need is not listed in the menu, click the

Service Management

button to add the new Service Name, and enter the Protocol and Port Range. For

Application

Start and End

Protocol

IP Address

Enable

Web server

80 to 80

Both

192.168.1.100

X

FTP server

21 to 21

TCP

192.168.1.101

X

SMTP (outgoing)

25 to 25

Both

192.168.1.102

X

POP3 (incoming)

110 to 110

Both

192.168.1.102

X

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71

Appendix A: Troubleshooting

Common Problems and Solutions

10/100 4-Port VPN Router

example, if you have a web server, you would enter the range 80 to 80. Click the

Add to List

button. Then

click the

Save Setting

button. Click the

Exit

button.

C.

Enter the IP Address of the server that you want the Internet users to access. 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. Then check the

Enable

checkbox for the entry. Consider the examples below:

D.

Click the

Add to List

button, and configure as many entries as you like.

When you have completed the configuration, click the

Save Settings

button.

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 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

http://192.168.1.1

or the IP address of the Router. Go

to the

Setup

=>

Forwarding

tab.

B.

Disable or remove the entries you have entered for forwarding. To delete an entry, select it and then click

the

Delete selected application

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

C.

Click the

DMZ Host

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 C: 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.

Application

Start and End

Protocol

IP Address

Enabled

UT

7777 to 27900

Both

192.168.1.100

X

Halflife

27015 to 27015

Both

192.168.1.105

X

PC Anywhere

5631 to 5631

UDP

192.168.1.102

X

VPN IPSEC

500 to 500

UDP

192.168.1.100

X

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