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EtherFast
®
Cable/DSL Router with QoS and 8-Port Switch
F.
Click the
OK
button in the TCP/IP properties window, and click
Close
or
the
OK
button for the Network window.
G.
Restart the computer when asked.
For Windows 2000:
A. Click
Start
, choose
Settings
, and open the
Control Panel
. Double-click
Network and Dial-Up Connections
.
B.
Right-click the
Local Area Connection
that is associated with the Ethernet
adapter you are using, and select the
Properties
option.
C. In the Components checked are used by this connection box, highlight
Internet Protocol (TCP/IP)
, and click the
Properties
button. Select
Use
the following IP address
option.
D.
Enter an
IP address
that is not used by any other computer on the network
connected to the Router. You can only use an IP address in the ranges
192.168.1.2 to 192.168.1.99 and 192.168.1.151 to 192.168.1.254.
E.
Enter the Subnet Mask,
255.255.255.0
.
F.
Enter the Default Gateway,
192.168.1.1
(The Router’s default IP address.)
G. Toward the bottom of the window, select
Use the following DNS server
addresses
, and enter the
Preferred DNS server IP Address
and
Alternative DNS server IP Address
. Contact your ISP to find this infor-
mation.
H.
Click the
OK
button in the Internet Protocol (TCP/IP) Properties window,
and click the
OK
button in the Local Area Connection Properties window.
I.
Restart the computer if asked.
For Windows NT 4.0:
A. Click
Start
, choose
Settings
, and open the
Control Panel
. Double-click
the
Network
icon.
B.
Click the
Protocol
tab, and double-click
TCP/IP Protocol
.
C. When the window appears, make sure you have selected the correct
Adapter
for your Ethernet adapter.
D. Select
Specify an IP address
, and enter an
IP address
that is not used by
any other computer on the network connected to the Router. You can only
use an IP address in the ranges 192.168.1.2 to 192.168.1.99 and
192.168.1.151 to 192.168.1.254.
E.
Enter the Subnet Mask,
255.255.255.0
.
F.
Enter the Default Gateway,
192.168.1.1
(Router’s default IP address).
G.
Click the
DNS
tab, and enter the
Host
and
Domain
names (e.g., John for
Host and home for Domain). Under DNS Service Search Order, click the
Add
button.
Enter the
DNS IP address
in the DNS Server field, and click
the
Add
button. Repeat this action for all DNS IP addresses given by your
ISP.
Instant Broadband
®
Series
56
55
Appendix A: Troubleshooting
This appendix consists of two parts: “Common Problems and Solutions” and
“Frequently Asked Questions.” Provided are possible solutions to problems that
may occur during the installation and operation of the Router. Read the descrip-
tions below to help solve your problems. If you can’t find an answer here, check
the Linksys website at
www.linksys.com
.
1. I need to set a static IP address on a PC.
The Router, by default, assigns an IP address range of 192.168.1.100 to
192.168.1.150 using the DHCP server on the Router. To set a static IP address,
you can only use the ranges 192.168.1.2 to 192.168.1.99 and 192.168.1.151 to
192.168.1.254. Each PC or network device that uses TCP/IP must have a
unique address to identify itself in a network. If the IP address is not unique to
a network, Windows will generate an IP conflict error message.
You can assign
a static IP address to a PC by performing the following steps:
For Windows 95, 98, and Me:
A. Click
Start
, choose
Settings
, and open the
Control Panel
. Then, double-
click
Network
.
B.
In The following network components are installed box, select the
TCP/IP-
Line
associated with your Ethernet adapter. If you only have one Ethernet
adapter installed, you will only see one TCP/IP line with no association to
an Ethernet adapter. Highlight it and click the
Properties
button.
C. In the TCP/IP properties window, select the
IP address
tab, and select
Specify an IP address
. Enter an
IP address
that is not used by any other
computer on the network connected to the Router. You can only use an IP
address in the ranges 192.168.1.2 to 192.168.1.99 and 192.168.1.151 to
192.168.1.254.
Make sure that each IP address is unique for each PC or
network device.
D.
Click the
Gateway
tab, and in the New Gateway prompt, enter
192.168.1.1
,
which is the default IP address of the Router. Click the
Add
button to accept
the entry.
E.
Click the
DNS
tab, and make sure the
DNS Enabled
option is selected.
Enter the
Host
and
Domain
names (e.g., John for Host and home for
Domain). Enter the
DNS entry
provided by your ISP. If your ISP has not
provided the DNS IP address, contact your ISP to get that information or go
to its website for the information.
Common Problems and Solutions
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EtherFast
®
Cable/DSL Router with QoS and 8-Port Switch
Instant Broadband
®
Series
58
For Windows 2000:
1) Click
Start
, choose
Settings
, and open the
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 when 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 open the
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.
5)
Click the
OK
button in the Internet Protocol (TCP/IP) Properties window,
and click the
OK
button in the Local Area Connection Properties window.
6)
Restart the computer when asked.
For Windows NT 4.0
:
1) Click
Start
, choose
Settings
, and open the
Control Panel
. Double-click
the
Network
icon.
2)
Click the
Protocol
tab, and double-click on
TCP/IP Protocol
.
3) When the window appears, make sure you have selected the correct
Adapter
for your Ethernet adapter and set it for
Obtain an IP address
from a DHCP server
.
4). Click the
OK
button in the TCP/IP Protocol Properties window, and click
the
Close
button in the Network window.
5)
Restart the computer if asked.
57
H.
Click the
OK
button in the TCP/IP Protocol Properties window, and click
the
Close
button in the Network window.
I.
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.
A. Click
Start
and open the
Control Panel
.
B.
Click the
Network and Internet Connections
icon and then the
Network
Connections
icon.
C.
Right-click the
Local Area Connection
that is associated with the Ethernet
adapter you are using, and select the
Properties
option.
D. In the This connection uses the following items box, highlight
Internet
Protocol (TCP/IP)
. Then, click the
Properties
button.
E.
Enter a unique
IP address
that is not used by any other computer on the net-
work connected to the Router. You can only use an IP address in the ranges
192.168.1.2 to 192.168.1.99 and 192.168.1.151 to 192.168.1.254.
F.
Enter the Subnet Mask,
255.255.255.0
.
G.
Enter the Default Gateway,
192.168.1.1
(Router’s default IP address).
H. Toward the bottom of the window, select
Use the following DNS server
addresses
, and enter the
Preferred DNS server IP Address
and
Alternative DNS server IP Address
. Contact your ISP to find this infor-
mation.
I.
Click the
OK
button in the Internet Protocol (TCP/IP) Properties window.
Click the
OK
button in the Local Area Connection Properties window.
2.
My Internet connection isn’t working.
A
Check your TCP/IP settings.
For Windows 95, 98, and Me:
Refer to “Appendix D: Installing the TCP/IP Protocol” and “Chapter 4:
Configure the PCs” for details. Make sure
Obtain IP address automati-
cally
is selected in the settings.
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EtherFast
®
Cable/DSL Router with QoS and 8-Port Switch
E.
Make sure that the cable connecting from your cable or DSL modem is con-
nected to the Router’s WAN port. Verify that the Status page of the Router’s
web interface 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.
4. I am not able to access the Router’s web interface Setup page.
A.
Refer to “Problem #2, My Internet connection isn’t working” to verify that
your computer is properly connected to the Router.
B.
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.
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
or the
IP
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.
Instant Broadband
®
Series
60
59
B.
Open a command prompt.
• For
Windows 95, 98,
and
Me
, click
Start
and choose
Run
. In the Open
field, type in
command
. Press the
Enter
key or click the
OK
button.
• For
Windows NT, 2000,
and
XP
, please click
Start
and choose
Run
. In
the Open field, type
cmd
. Press the
Enter
key or click the
OK
button.
C.
In the command prompt, type
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.
D.
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.
E.
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 cannot
open a webpage, try the ping command from a different computer to ver-
ify 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.
A.
Refer to “Problem #2, My Internet connection isn’t working” to verify that
you are connected.
B.
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.
C.
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.
D.
Make sure that you have the right cable. Check to see if the WAN column
has a solidly lit Link LED.
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EtherFast
®
Cable/DSL Router with QoS and 8-Port Switch
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:
A.
Access the Router’s web interface by going to
or the
IP
address
of the Router. Go to the
Advanced => Forwarding
tab.
B.
Enter any
name
you want to use for the Customized Application.
C.
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.
D.
Check the
protocol
you will be using, TCP and/or UDP.
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 192.168.1.100, 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.
F.
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
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
Apply
button.
Instant Broadband
®
Series
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 for more information at
www.linksys.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.
A.
Access the Router’s web-based utility by going to
or the
IP address
of the Router. Go to the
Advanced => Forwarding
tab.
B.
Enter any
name
you want to use for the Customized Application.
C.
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.
D.
Check the
protocol
you will be using, TCP and/or UDP.
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 192.168.1.100, 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.
F.
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
X
X
192.168.1.100
X
FTP server
21 to 21
X
192.168.1.101
X
SMTP (outgoing)25 to 25
X
X
192.168.1.102
X
POP3 (incoming)110 to 110
X
X
192.168.1.102
X
When you have completed the configuration, click the
Apply
button.
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EtherFast
®
Cable/DSL Router with QoS and 8-Port Switch
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
.
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
.
Choose
Preferences
. Click
Advanced
, and then click
Proxies
.
B.
Make sure that you have
Direct connection to the Internet
selected on this
screen.
C.
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
Linksys website and download the latest firmware at
www.linksys.com
. Follow
these steps:
A. Go to the Linksys website at
and download the
latest firmware.
B.
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.
Instant Broadband
®
Series
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:
A.
Access the Router’s web-based utility by going to
or the
IP address
of the Router. Go to the
Advanced => Forwarding
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 Host
tab.
D.
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.
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:
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
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
.
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