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Page 31 / 63 Scroll up to view Page 26 - 30
EtherFast
®
Cable/DSL VPN Router with 4-Port 10/100 Switch
55
From the MAC Address Clone screen, shown in Figure 6-36, you can change
the Router’s WAN Mac Address.
The Router’s
MAC address
is a 12-digit code assigned to a unique piece of
hardware for identification, like a social security number.
Some ISPs require
that you register the MAC address of your network card/adapter, which was
connected to your cable or DSL modem during installation.
If your ISPs
require MAC address registration, find your adapter’s MAC address by doing
the following:
1. Click the
Start
button, and select
Run
. Run
winipcfg
, and then click
more
info
. Or at the command prompt, run
ipconfig/all
, and look at your
adapter’s physical address.
2. Enter those 12 digits into the WAN MAC Address fields, and click the
Apply
button followed by the
Continue
button.
This “clones” your net-
work adapter’s MAC address onto the Router, and prevents you from hav-
ing to call your ISP to change the registered MAC address to the Router’s
MAC address.
MAC Address Cloning
Figure 6-36
From the DMZ Host screen, shown in Figure 6-35, you can allow one local user
to be exposed to the Internet to use a special-purpose service such as Internet
gaming or videoconferencing.
Whereas IP Forwarding can only forward a maximum of ten ranges of ports,
DMZ hosting forwards all the ports for one PC simultaneously.
•
To expose one PC, enter the computer’s IP address and click the
Apply
but-
ton and
Continue
button.
•
Deactivate DMZ by entering
0
in the field and clicking the
Apply
button
and
Continue
button.
Figure 6-35
DMZ Host
Instant Broadband
®
Series
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Page 32 / 63
EtherFast
®
Cable/DSL VPN Router with 4-Port 10/100 Switch
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 NT 4.0:
A. Click
Start
,
Settings
, and
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 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.
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.
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.
57
Instant Broadband
®
Series
56
Appendix A:Troubleshooting
Common Problems and Solutions
This appendix consists of two parts: “Common Problems and Solutions” and
“Frequently Asked Questions.” Provided are possible solutions to problems regard-
ing the installation and operation of the Router. If your situation is described here,
the problem should be solved by applying the corresponding solution. 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
,
Settings
, and
Control Panel
. Double-click
Network
.
B. 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.
C.
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 com-
puter 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 Router’s default IP address. 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.
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.
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EtherFast
®
Cable/DSL VPN Router with 4-Port 10/100 Switch
59
Instant Broadband
®
Series
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. Select the
use the following IP address
radio button. 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.
2. I want to test my Internet connection.
A.
Check your TCP/IP settings.
For Windows 95, 98, and Me:
Refer to “Appendix F: Installing the TCP/IP Protocol” and “Chapter 5:
Configuring Your Network” for details. Make sure
Obtain IP address
automatically
is selected in the settings.
For Windows 2000:
• Click
Start
,
Settings
, and
Control Panel
. Double-click
Network and
Dial-Up Connections
.
• Right-click the
Local Area Connection
that is associated with the
Ethernet adapter you are using, and select the
Properties
option.
• In the
Components checked are used by this connection
box, highlight
Internet Protocol (TCP/IP)
, and click the
Properties
button. Make sure
58
that
Obtain an IP address automatically
and
Obtain DNS server
address automatically
are selected.
• Click the
OK
button in the
Internet Protocol (TCP/IP) Properties
win-
dow, and click the
OK
button in the Local Area Connection Properties
window.
• 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.
• Click
Start
and
Control Panel
.
• Click the
Network and Internet Connections
icon and then the
Network Connections
icon.• Right-click the
Local Area Connection
that is associated with the Ethernet adapter you are using, and select the
Properties
option.
• 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.
• Click the
OK
button in the
Internet Protocol (TCP/IP) Properties
win-
dow, and click the
OK
button in the
Local Area Connection Properties
window.
• Restart the computer if asked.
For Windows NT 4.0
:
• Click
Start
,
Settings
, and
Control Panel
. Double-click the
Network
icon.
• Click the
Protocol
tab, and double-click on
TCP/IP Protocol
.
• 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
.
• Click the
OK
button in the
TCP/IP Protocol Properties
window, and click
the
Close
button in the
Network
window.
• Restart the computer if asked.
B.
Open a command prompt.
• For
Windows 95, 98,
and
Me
, please click
Start
and
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
Run
. In the Open
field, type
cmd
. Press the
Enter
key or click the
OK
button.
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Page 34 / 63
EtherFast
®
Cable/DSL VPN Router with 4-Port 10/100 Switch
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 Web-based Utility’s 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 G: 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) working through the Router.
Open the Router’s Web-based Utility, as shown in “Chapter 6: The Cable/DSL
VPN Router’s Web-based Utility” and go to the
Advanced => Filter
tab.
Make
sure 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
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 incom-
patibility with the NAT standard.
Change the Router’s IP address to another subnet to avoid a conflict between
the VPN IP address and your local IP address. For example, if your VPN serv-
er 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 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.
61
Instant Broadband
®
Series
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 Router’s
Web-based Utility. 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 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 an IP address on the WAN 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 G: 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 Cable/DSL VPN Router’s Web-based Utility” for details.
C.
Make sure you are using the right WAN settings. Contact your ISP to see if
your WAN connection type is DHCP, Static IP Address, or PPPoE (com-
monly used by DSL consumers).
Please refer to the Setup section of
“Chapter 6: The Cable/DSL VPN Router’s Web-based Utility” for details
on WAN settings.
D.
Make sure you have the right cable. Check to see if the WAN column has a
solidly lit Link LED.
E.
Make sure 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-based Utility shows a valid IP address from your ISP.
60
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EtherFast
®
Cable/DSL VPN Router with 4-Port 10/100 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
you to 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 use a certain Internet application:
A. Open the Router’s Web-based Utility, as shown in “Chapter 6: The
Cable/DSL VPN Router’s Web-based Utility” and go to the
Advanced =>
Filter
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 G: 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 and then
the
Continue
button.
63
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. Open the Router’s Web-based Utility, as shown in “Chapter 6: The
Cable/DSL VPN Router’s Web-based Utility” and go to the
Advanced =>
Filter
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 G: 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 and then
the
Continue
button.
62
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