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Page 36 / 68 Scroll up to view Page 31 - 35
30
Appendix A: Troubleshooting
Common Problems and Solutions
Broadband Router
For Windows 2000:
A.
Click
Start
,
Settings
, and
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 a unique 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.
Toward the bottom of the window, select
Use the following DNS server addresses
, and enter the
Preferred DNS server and Alternative DNS server (provided by your ISP). Contact your ISP or go on its
website to find the information.
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 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
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)
. Click the
Properties
button.
E.
Enter a unique 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.
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 and Alternative DNS server (provided by your ISP). Contact your ISP or go on its
website to find the information.
I.
Click the
OK
button in the
Internet Protocol (TCP/IP) Properties
window. Click the
OK
button in the
Local
Area Connection Properties
window.
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Page 37 / 68
31
Appendix A: Troubleshooting
Common Problems and Solutions
Broadband Router
2.
I want to test my Internet connection.
A.
Check your TCP/IP settings.
For Windows 98 and Millennium:
Refer to “Appendix F: Windows Help” 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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Page 38 / 68
32
Appendix A: Troubleshooting
Common Problems and Solutions
Broadband 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
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 5: Setting up
and Configuring the Broadband Router” 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 5: Setting up and Configuring the Broadband Router” 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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33
Appendix A: Troubleshooting
Common Problems and Solutions
Broadband 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
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.
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34
Appendix A: Troubleshooting
Common Problems and Solutions
Broadband Router
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 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.
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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