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96
Appendix A: Troubleshooting
Common Problems and Solutions
Wireless-G Router for 3G/UMTS Broadband
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 descriptions below to help you solve your problems. If you can’t find an answer here, check the Linksys
website at www.linksys.com/international.
Common Problems and Solutions
1.
I’m trying to access the Router’s web-based utility, but I do not see the login screen. Instead, I see a
screen saying, “404 Forbidden.”
If you are using Windows Explorer, perform the following steps until you see the web-based utility’s login
screen (Netscape Navigator will require similar steps):
1.
Click
File
. Make sure
Work Offline
is NOT checked.
2.
Press
CTRL + F5
. This is a hard refresh, which will force Windows Explorer to load new webpages,
not cached ones.
3.
Click
Tools
. Click
Internet Options
. Click the
Security
tab. Click the
Default level
button. Make sure
the security level is Medium or lower. Then click the
OK
button.
2.
I need to set a static IP address on a PC.
You can assign a static IP address to a PC by performing the following steps:
•
For Windows 98SE and Me:
1.
Click
Start
,
Settings
, and
Control Panel
. Double-click
Network
.
2.
In The following network components are installed box, select the TCP/IP-> 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.
3.
In the TCP/IP properties window, select the
IP address
tab, and select
Specify an IP address
. Enter
a unique IP address that is not used by any other computer on the network connected to the Router.
Make sure that each IP address is unique for each PC or network device.
4.
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.
5.
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.
6.
Click the
OK
button in the TCP/IP properties window, and click
Close
or the
OK
button for the Network
window.
7.
Restart the computer when asked.
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97
Appendix A: Troubleshooting
Common Problems and Solutions
Wireless-G Router for 3G/UMTS Broadband
•
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. Select
Use the following IP address
option.
4.
Enter a unique IP address that is not used by any other computer on the network connected to the
Router.
5.
Enter the Subnet Mask,
255.255.255.0
.
6.
Enter the Default Gateway,
192.168.1.1
(Router’s default IP address).
7.
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.
8.
Click the
OK
button in the Internet Protocol (TCP/IP) Properties window, and click the
OK
button in the
Local Area Connection Properties window.
9.
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)
. Click the
Properties
button.
5.
Enter a unique IP address that is not used by any other computer on the network connected to the
Router.
6.
Enter the Subnet Mask,
255.255.255.0
.
7.
Enter the Default Gateway,
192.168.1.1
(Router’s default IP address).
8.
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.
9.
Click the
OK
button in the Internet Protocol (TCP/IP) Properties window. Click the
OK
button in the
Local Area Connection Properties window.
3.
I want to test my Internet connection.
A
Check your TCP/IP settings.
For Windows 98SE, Me, 2000, and XP:
•
Refer to Windows Help for details. Make sure Obtain IP address automatically is selected in the settings.
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98
Appendix A: Troubleshooting
Common Problems and Solutions
Wireless-G Router for 3G/UMTS Broadband
B
Open a command prompt.
For Windows 98SE and Me:
•
Click
Start
and
Run
. In the
Open
field, type
command
. Press the
Enter
key or click the
OK
button.
For Windows 2000 and XP:
•
Click
Star
t and
Run
. In the
Open
field, type
cmd
. Press the
Enter
key or click the
OK
button. 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.
C
In the command prompt, type
ping
followed by your Internet or WAN IP address and press the
Enter
key.
The Internet or WAN IP Address can be found on the Status screen of the Router’s web-based utility. For
example, if your Internet or 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 computer to verify that your original
computer is not the cause of the problem.
D
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 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.
4.
I am not getting an IP address on the Internet with my Internet connection.
•
Refer to “Problem #3, I want to test my Internet connection” to verify that you have connectivity.
•
If you need to register the MAC address of your Ethernet adapter with your ISP, please see “Appendix E:
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 System section of “Chapter 8: Configuring the
Wireless-G Router for 3G/UMTS Broadband” for details.
•
Make sure you are using the right Internet connection 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 Setup section of “Chapter 8: Configuring the Wireless-G Router for 3G/UMTS Broadband” for details
on Internet connection settings.
•
Make sure you have the right cable. Check to see if the Internet column has a solidly lit Link/Act LED.
•
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.
•
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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99
Appendix A: Troubleshooting
Common Problems and Solutions
Wireless-G Router for 3G/UMTS Broadband
5.
I am not able to access the Setup page of the Router’s web-based utility.
•
Refer to “Problem #3, I want to test my Internet connection” to verify that your computer is properly
connected to the Router.
•
Refer to “Appendix E: 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 #2: I need to set a static IP address.”
•
Refer to “Problem #10: I am a PPPoE user, and I need to remove the proxy settings or the dial-up pop-up
window.”
6.
I need to set up a server behind my Router and make it available to the public.
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.
1.
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 Applications & Gaming => Port Range Forward tab.
2.
Enter any name you want to use for the Application.
3.
Enter the Start and End Port range of the service you are using. For example, if you have a web server,
you would enter the range 80 to 80.
4.
Select the protocol(s) you will be using, TCP and/or UDP.
5.
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 E: Finding the MAC Address and IP Address for Your Ethernet Adapter” for
details on getting an IP address.
6.
Check the
Enable
option for the port services you want to use. Consider the example below:
When you have completed the configuration, click the
Save Settings
button.
Application
Start and End
Protocol
IP Address
Enabled
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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100
Appendix A: Troubleshooting
Common Problems and Solutions
Wireless-G Router for 3G/UMTS Broadband
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:
1.
Access the Router’s web interface by going to http://192.168.1.1 or the IP address of the Router. Go to
the Applications & Gaming => Port Range Forward tab.
2.
Enter any name you want to use for the Application.
3.
Enter the Start and End 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.
4.
Select the protocol(s) you will be using, TCP and/or UDP.
5.
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 E: Finding the MAC Address and IP Address for Your Ethernet Adapter” for
details on getting an IP address.
6.
Check the
Enable
option for the port services you want to use. Consider the example below:
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.)
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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