Linksys NR041 Router Manual PDF (Setup & Configuration Guide)

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Cable/DSL 4-Port Router

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.

4. I am not able to access the Router’s web interface Setup page.

Refer to “Problem #2, My Internet connection isn’t working” to verify that

your computer is properly connected to the Router.

Refer to “Appendix F: 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.

Set a static IP address on your system; refer to “Problem #1: I need to set a

static IP address.”

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

address

of the Router, and go to the

Advanced => Filter

tab.

Make sure that

you have IPsec pass-through 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 Router; however, simultaneous IPSec sessions might 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 incom-

patibility 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 Setup tab

of the web interface.

If you assigned a static IP address to any computer or net-

work 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.

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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, please check the cable, and make sure

Obtain

an IP address automatically

is selected in the TCP/IP settings for your

Ethernet adapter.

In the command prompt, type

ping

followed by your WAN IP address and

press the

Enter

key.

The WAN IP Address can be found in the web inter-

face of the Router. For example, if your WAN 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 com-

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

In the command prompt, type

ping www.yahoo.com

and press the

Enter

key.

• If you get a reply, the computer is connected to the Internet. If you can-

not 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 orig-

inal computer is not the cause of the problem.

3. I am not getting a WAN IP address with my Internet connection.

Refer to “Problem #2, My Internet connection isn’t working” to verify that

you are connected.

If you need to register the MAC address of your Ethernet adapter with your

ISP, please see “Appendix F: 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 6: The Router’s Web-based Utility” for details.

Make sure that you are using the right WAN settings. Contact your ISP to

see if your WAN connection type is DHCP, Static IP Address, or PPPoE

(commonly used by DSL consumers).

Please refer to the Setup section of

“Chapter 6: The Router’s Web-based Utility” for details on WAN settings.

Make sure that you have the right cable. Check to see if the WAN column

has a solidly lit Link LED.

Make sure that the cable connecting from your cable or DSL modem is con-

nected to the Router’s Internet (or WAN) port. Verify that the Status page of

the Router’s web interface shows a valid IP address from your ISP.

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Cable/DSL 4-Port Router

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 that

you set up the Router to deliver incoming packets or data to a specific com-

puter.

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 to use a certain Internet application:

Access the Router’s web interface by going to

http://192.168.1.1

or the

address

of the Router. Go to the

Advanced => Forwarding

tab.

Enter any

name

you want to use for the Customized Application.

Enter the

Ext. 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.

Check the

protocol

you will be using, TCP and/or UDP.

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 192.168.1.100, you would enter 100 in the field provided. Check

“Appendix F: Finding the MAC Address and IP Address for Your Ethernet

Adapter” for details on getting an IP address.

Check the

Enable

option for the port services you want to use. Consider the

example below:

Customized

Ext. Port

TCP

UDP

IP Address

Enable

Application

7777 to 27900

192.168.1.100

Halflife

27015 to 27015

192.168.1.105

PC Anywhere

5631 to 5631

192.168.1.102

VPN IPSEC

500 to 500

192.168.1.100

When you have completed the configuration, click the

Apply

button and then

the

Continue

button.

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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 Network Everywhere website for more information at

www.NetworkEverywhere.com

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 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.

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

Advanced => Forwarding

tab.

Enter any

name

you want to use for the Customized Application.

Enter the

Ext. Port range

of the service you are using. For example, if you

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

Check the

protocol

you will be using, TCP and/or UDP.

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 192.168.1.100, you would enter 100 in the field provided. Check

“Appendix F: Finding the MAC Address and IP Address for Your Ethernet

Adapter” for details on getting an IP address.

Check the

Enable

option for the port services you want to use. Consider the

example below:

Customized

Ext. Port

TCP

UDP

IP Address

Enable

Application

Web server

80 to 80

192.168.1.100

FTP server

21 to 21

192.168.1.101

SMTP (outgoing)

25 to 25

192.168.1.102

POP3 (incoming)

110 to 110

192.168.1.102

When you have completed the configuration, click the

Apply

button and then

the

Continue

button.

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Cable/DSL 4-Port Router

10. I am a PPPoE user and I want to remove 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

, choose

Settings

, and open the

Control Panel

. Double-click

Internet Options

Click the

Connections

tab.

Click the

LAN settings

button and remove anything that is checked.

Click the

button to go back to the previous screen.

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

Choose

Preferences

. Click

Advanced

, and then click

Proxies

Make sure that you have

Direct connection to the Internet

selected on this

screen.

Close all the windows to finish.

11. I want to reset the Router to the factory default settings.

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.

12. I want to upgrade my Router’s firmware.

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

Network Everywhere website and download the latest firmware at

www.NetworkEverywhere.com

. Follow these steps:

A. Go

the

Network

Everywhere

website

http://www.NetworkEverywhere.com

and download the latest firmware.

Go to the Help section found in

“Chapter 6: The Cable/DSL Router’s Web-

based Utility.” Follow the steps to upgrade the firmware that you down-

loaded from the website.

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8. I can’t get my 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 applica-

tion requires too many ports or when you are not sure which port services to

use. Make sure that you disable all the forwarding entries if you want to suc-

cessfully use DMZ hosting, since forwarding has priority over DMZ hosting.

(In other words, data that enters the Router will be checked first by the for-

warding settings. If the port number that the data enters from does not have port

forwarding, then the Router will send the data to the PC or network device you

set for DMZ hosting.)

Follow these steps to set DMZ hosting:

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

Advanced => Forwarding

tab.

Disable or remove the entries you have entered for forwarding.

Keep this

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

Click the

DMZ Host

tab.

Enter the Ethernet adapter’s

IP address

of the computer you want exposed

to the Internet.

This will bypass the NAT firewall for that computer. Please

refer to “Appendix F: 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

Apply

button and then the

Continue

button.

9. The password prompt always appears when I am saving settings to the Router.

Reset the Router to the factory default by pressing the

Reset

button for 30 sec-

onds and then releasing it. If you are still getting prompted for a password when

saving settings, then perform the following steps:

Access the Router’s web interface by going to

http://192.168.1.1

or the

address

of the Router. Enter the default password

admin

, and click the

Password

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

Apply

and then

Continue

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Cable/DSL 4-Port Router

15. 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 recom-

mended to use MTU 1492.

If you are having some difficulties, perform the fol-

lowing steps:

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

http://192.168.1.1

or the

IP address

of the Router.

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

admin

Click the

Advanced => Filter

tab.

Look for the MTU option, and select

Enable

. In the Size field, enter

1492

Click the

Apply

button and click the

Continue

button to continue.

If your difficulties continue, change the

Size

to different values. Try one value

at a time, in this order, until your problem is solved:

1462

1400

1362

1300

16. I need to use port triggering.

Port triggering looks at the outgoing port services that are used and will trigger

the Router to open the port that the Internet application uses.

Follow these

steps:

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

http://192.168.1.1

or the

IP address

of the Router.

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

admin

Click the

Advanced => Forwarding

tab, and click the

Port Trigger

button.

Enter any

name

you want to use for the Application Name.

E. Enter the

Triggered Port Range

. Check with your Internet application

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

Enter the

Incoming Port Range

. Check with your Internet Application

provider for more information on which incoming port services are

required by the Internet application.

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13. The firmware upgrade failed and/or

the Diag LED is flashing.

The upgrade could have failed for a number of reasons.

Follow these steps to

upgrade the firmware and/or make the Diag 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 PC; refer to “Problem #1, I need to set a stat-

ic 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 Router’s web-based

utility through its Help tab.

14. I am using PPPoE with my DSL service, but it is always disconnecting.

PPPoE is not a dedicated or always-on connection.

The DSL ISP can discon-

nect the service after a period of inactivity, just like a normal phone dial-up

connection to the Internet.

Using the setup option “keep alive” will help keep

the connection.

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

connection periodically.

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

http://192.168.1.1

or the

IP address

of the Router.

Enter the

password

, if asked. (The default password is

admin

In the Setup tab, select the option

Keep Alive

, and set the

Redial Period

option at

(seconds).

Click the

Apply

button, and then click the

Continue

button.

Click the

Status

tab, and then click the

Connect

button.

You may see the login status display as

Connecting

. Press the

key to

refresh the screen, until you see the login status display as

Connected

Click the

Apply

button and click the

Continue

button to continue.

If the connection is lost again, follow steps E to G to re-establish the connec-

tion.

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Cable/DSL 4-Port Router

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17. The Diag LED stays lit continuously.

• The Diag LED lights up when the device is first powered up. Meantime,

the system will boot up itself and check for proper operation. After fin-

ishing the checking procedure, the LED turns off to show that the system

is working fine. If the LED remains lit after one minute, 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.

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

• Make sure that the other PCs work. If they do, ensure that your worksta-

tion’s IP settings are correct (IP Address, Subnet Mask, Default Gateway,

and DNS). Restart the computer that is having a problem.

• If the PCs are configured correctly, but still not working, check the

Router. Ensure that it is connected and ON. Connect to it and check its

settings. (If you cannot connect to it, check the LAN and power connec-

tions.)

• If the Router is configured correctly, check your Internet connection

(DSL/cable modem, etc.) to see if it is working correctly. You can remove

the Router to verify a direct connection.

• Manually configure the TCP/IP with a DNS address provided by your

ISP.

• Make sure that your browser is set to connect directly and that any dial-

up is disabled. For Internet Explorer, click on

Tools

, choose

Internet

Options

, and then the select the

Connection

tab. Make sure that the

Internet Explorer is set to

Never dial a connection

. For Netscape

Navigator, click

Edit

Preferences

Advanced

, and

Proxy

. Make sure

that Netscape Navigator is set to

Direct connection to the Internet

19. The Full/Col LED keeps flickering continuously.

• Check the Category 5 Ethernet cable and its RJ-45 connectors.

• There may be interference with other network devices. Try removing

other PCs or network devices to see if the problem persists. Eliminate

each network device one at a time to determine the cause.

What is the maximum number of IP addresses that the Router will support?

The

Router will support up to 253 IP addresses.

Is IPSec Pass-Through supported by the Router?

Yes, it is a built-in feature that

the Router automatically enables.

Where is the Router installed on the network?

In a typical environment, the

Router is installed between the cable/DSL modem and the LAN.

Plug the

Router into the cable/DSL modem’s Ethernet port.

Does the Router support IPX or AppleTalk?

No. TCP/IP is the only protocol stan-

dard for the Internet and has become the global standard for communications.

IPX, a NetWare communications protocol used only to route messages from

one node to another, and AppleTalk, a communications protocol used on

Apple and Macintosh networks, can be used for LAN to LAN connections,

but those protocols cannot connect from WAN to LAN.

Does the WAN connection of the Router support 100 Mbps Ethernet?

Yes, the

Internet port supports 10 and 100 Mbps.

What is Network Address Translation and what is it used for?

Network Address

Translation (NAT) translates multiple IP addresses on the private LAN to one

public address that is sent out to the Internet. This adds a level of security

since the address of a PC connected to the private LAN is never transmitted

on the Internet. Furthermore, NAT allows the Router to be used with low cost

Internet accounts, such as DSL or cable modems, when only one TCP/IP

address is provided by the ISP. The user may have many private addresses

behind this single address provided by the ISP.

Does the Router support any operating system other than Windows 95, Windows

98, Windows 2000, Windows NT, or Windows XP?

Yes, but Network Everywhere

does not, at this time, provide technical support for setup, configuration or

troubleshooting of any non-Windows operating systems.

Does the Router support ICQ send files?

Yes, with the following fix: click

ICQ

menu -> preference -> connections tab->

, and check

I am behind a fire-

wall or proxy

. Then set the firewall time-out to

seconds in the firewall set-

ting. The Internet user can then send a file to a user behind the Router.

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