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EtherFast
®
Cable/DSL VPN Router with 4-Port 10/100 Switch
5
Instant Broadband
®
Series
4
There are two basic ways to create a VPN connection:
VPN Router to VPN Router
Computer (using VPN client software that supports IPSec) to VPN Router
The VPN Router creates a “tunnel” or channel between two endpoints, so that
data transmissions between them are secure. A computer with VPN client soft-
ware that supports IPSec can be one of the two endpoints. Any computer with
the built-in IPSec Security Manager (Microsoft 2000 and XP ) allows the VPN
Router to create a VPN tunnel using IPSec (refer to “Appendix C: Configuring
IPSec between a Windows 2000 or XP PC and the VPN Router”). Other ver-
sions of Microsoft operating systems require additional, third-party VPN client
software applications that support IPSec to be installed.
VPN Router to VPN Router
An example of a VPN Router-to-VPN Router VPN would be as follows. (See
Figure 2-1.) At home, a telecommuter uses his VPN Router for his always-on
Internet connection. His router is configured with his office's VPN settings.
When he connects to his office's router, the two routers create a VPN tunnel,
encrypting and decrypting data. As VPNs utilize the Internet, distance is not a
factor. Using the VPN, the telecommuter now has a secure connection to the
central office's network, as if he were physically connected.
Figure 2-1
Computer (using VPN client software that supports IPSec) to VPN Router
The following is an example of a computer-to-VPN Router VPN. (See Figure
2-2.) In her hotel room, a traveling businesswoman dials up her ISP. Her note-
book computer has VPN client software that is configured with her office's
VPN settings. She accesses the VPN client software that supports IPSec and
connects to the VPN Router at the central office. As VPNs utilize the Internet,
distance is not a factor. Using the VPN, the businesswoman now has a secure
connection to the central office's network, as if she were physically connected.
For additional information and instructions about creating your own VPN,
please visit Linksys’s website at
www.linksys.com
or refer to “Appendix C:
Configuring IPSec between a Windows 2000 or XP PC and the VPN Router.”
Important:
You must have at least one VPN Router on one end of the
VPN tunnel. At the other end of the VPN tunnel, you must have a sec-
ond VPN Router or a computer with VPN client software that sup-
ports IPSec.
Figure 2-2
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EtherFast
®
Cable/DSL VPN Router with 4-Port 10/100 Switch
The VPN Router’s LEDs, shown in Figure 3-2, provide a graphic display of
activity.
The LAN Indicators
Power
Green
. The Power LED illuminates when the Router is powered on.
Link/Act
Green
. The Link/Act LED serves two purposes. If the LED is con-
tinuously illuminated, the Router is successfully connected to a
device through the corresponding port (1-4). If the LED is flicker-
ing, the Router is actively sending or receiving data over that port.
7
Instant Broadband
®
Series
6
The Cable/DSL VPN Router’s Front Panel LEDs
Important: The Reset Button
*
The
Reset
button can be used in one of two ways.
1.
If the VPN Router is having problems connecting to the
Internet, press the
Reset
button for just a moment with a paper
clip or a pencil tip.
This clears up any jammed connections,
and is similar to pressing the
Reset
button on your PC to
reboot it.
2.
If you are experiencing extreme problems with the VPN
Router and have tried all other troubleshooting measures,
press the
Reset
Button, and hold it down until the red
Diag
LED on the front panel turns on and off completely.
This will restore factory defaults and clear all of the Router’s set-
tings, including the IP addresses you entered.
* The
Reset
Button is located on the Router’s rear panel.
Figure 3-2
Chapter 3: Getting to Know the
EtherFast
®
Cable/DSL VPN Router
with 4-Port 10/100 Switch
The rear panel of the VPN Router, shown in Figure 3-1, is where all of the
Router’s connections are made.
WAN
The WAN (Wide Area Network) Port is where you
will connect your Cable or DSL modem.
Ports 1-4
These four LAN (Local Area Network) ports are
where you will connect networked devices, such as
PCs, print servers, remote hard drives, and anything
else you want to put on your network.
Crossover Switch
The Crossover Switch (
X II
) toggles Port 4 between
crossover mode (
X
) and straight-through mode (
II
).
If you are connecting the Router directly to a com-
puter or to an Uplink port, choose straight-through
(
II
). For anything else, please refer to the chart
shown in “Chapter 4: Connecting the Cable/DSL
VPN Router to Your Network”, Figure 4-2.
Power
The Power Port is where you will connect the
included AC power adapter.
The Cable/DSL VPN Router’s Rear Panel
Figure 3-1
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EtherFast
®
Cable/DSL VPN Router with 4-Port 10/100 Switch
9
Instant Broadband
®
Series
8
Chapter 4: Connecting the
Cable/DSL VPN Router to Your
Network
Overview
Unlike a simple hub or switch, the VPN Router’s setup consists of more than
simply plugging everything together. Because the Router acts as a DHCP serv-
er, you will have to set some values within the Router, and also configure your
networked PCs to accept the IP Addresses the Router chooses to assign them.
You may need the following values from your ISP in order to install the Router:
Your broadband-configured PC’s fixed Internet IP Address (if applicable)
Your broadband-configured PC’s Computer Name and Workgroup Name
Your Subnet Mask (if applicable)
Your Default Gateway (if applicable)
Your Primary DNS IP Address (if applicable)
Whoever installed your broadband access should have left this information
with you. If not, call your ISP and they will be able to supply you with it.
Static IP Addresses
A static IP address is an IP address permanently assigned
to a computer in a TCP/IP network. Static IP addresses are usually assigned to
networked devices which are consistently accessed by multiple users, such as
Server PCs, or printers. If you are using the VPN Router to share your cable or
DSL Internet connection, contact your ISP to see if they have assigned your
home a static IP address. You will need that address during the Router’s con-
figuration.
Dynamic IP Addresses
A dynamic IP address is an IP address that is automatically
assigned to a client station (computer, printer, etc.) in a TCP/IP network. Dynamic
IP addresses are typically assigned by a DHCP server, which can be a computer
on the network or another piece of hardware, such as the Router. A dynamic IP
address may change every time your computer connects to the network.
Full/Col
Green
. The Full/Col LED also serves two purposes. If this
LED is continuously illuminated, the connection made
through the corresponding port is successfully running in
Full Duplex mode. If the LED is flickering, the connection is
experiencing collisions. Infrequent collisions are normal. If
this LED is flickering too often, there may be a problem with
your connection. Check the Troubleshooting section if you
think there is a problem.
100
Orange
. The 100 LED illuminates when a successful
100Mbps connection is made through the corresponding
port.
The WAN Indicators
Link
Green
. The Link LED illuminates when a successful connec-
tion is made between the Router and your Broadband device
or network.
Act
Green
. The Act LED flickers when the Router is sending or
receiving data over the broadband port.
Diag
Red
. The Diag LED illuminates when the Router goes
through its self-diagnosis mode during boot-up. It will turn
off upon successful completion of the diagnostic. If this LED
stays on for an abnormally long period of time, refer to
“Appendix A: Troubleshooting.”
About Static & Dynamic IP Addresses
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EtherFast
®
Cable/DSL VPN Router with 4-Port 10/100 Switch
4.
Connect the network cable from your cable or DSL
modem to the
WAN
port on the Router’s rear panel, as
shown in Figure 4-3.
This is the only port that will
work for your modem connection.
5.
Connect the power adapter to the
Power
port on the
Router’s rear panel, as shown in Figure 4-4, and then plug
the power adapter into a power outlet.
• The
Power
LED on the front panel will light up green as
soon as the power adapter is connected properly.
• The
Diag
LED will light up red for a few seconds when
the Router goes through its self-diagnostic test. This
LED will turn off when the self-test is complete.
6.
Turn on the cable or DSL modem.
7.
Press the Reset button on the Router’s front panel with a paper clip or a pen-
cil.
Hold the button in until the
Diag
LED lights up and then turns off. This
will restore the Router’s factory default settings.
The Hardware Installation is complete.
11
Instant Broadband
®
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10
Note:
The diagram above is for reference purposes only.
Every
network is different.
If you do not make a connection to a hub or
switch by using the settings above, change the position of the
Crossover Switch.
Figure 4-2
Important:
You should always plug the Router into a power strip
with surge protection.
DHCP (Dynamic Host Configuration Protocol)
DHCP is software that automati-
cally assigns IP addresses to client stations logging onto a TCP/IP network.
DHCP eliminates having to manually assign permanent IP addresses to every
device on your network. DHCP software typically runs in servers and is also
found in network devices such as routers.
Once you are sure that you have the above values on hand, you can begin the
installation and setup of the VPN Router.
1.
Power everything down, including your
PCs
, your
Cable
or
DSL
modem
and the
Router
.
2.
Connect a network cable from one
of the LAN ports on the back of
the Router to one of your PCs’
Ethernet ports, as shown in Figure
4-1. Do the same with all the PCs
you wish to connect to the Router.
3.
If you are using Port 4 to connect to a PC, set the Crossover Switch to
straight-through mode (
II
).
If you are connecting the Router to a hub or
switch, please refer to the chart shown in Figure 4-2 when setting the
Crossover Switch.
Note:
Some ISPs—most notably some cable providers—configure
their networks so that you do not have to enter a full Internet address
into your web browser or e-mail application to reach your home page
or receive your e-mail. If your Internet home page address is some-
thing very simple, such as “www”, rather than “www.linksys.com”,
or your e-mail server’s address is something similar to “e-mail” or
“pop3”, rather than “pop.mail.linksys.com”, you won’t be able to
properly configure the VPN Router until you determine the actual
Internet addresses of your Web and e-mail connections.
You
must
obtain this information prior to connecting the Router to
your network. You can obtain this information by contacting your ISP,
or turn to “Appendix E: How to Ping Your ISP’s E-mail and Web
Addresses.”
Connecting Everything Together & Booting Up
Figure 4-3
Figure 4-1
Figure 4-4
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EtherFast
®
Cable/DSL VPN Router with 4-Port 10/100 Switch
13
Instant Broadband
®
Series
12
4. Click the
Properties
button, and then choose the
IP Address
tab, as shown
in Figure 5-2. Select
Obtain an IP address automatically
. Click the
OK
button. You have completed the client settings.
5. Click the
OK
button. Windows may ask for original Windows installation
files. Supply them as needed (i.e.: D:\win98, D:\win95, D:\win9x,
c:\windows\options\cabs).
6. Windows will ask you to restart the PC. Click the
Yes
button.
Repeat these steps for each PC on your network.
When all of your PCs are
configured, proceed to the next page, “Configuring the Cable/DSL
VPN Router.”
Figure 5-2
Chapter 5: Configuring Your
Network
You must now configure your other PCs to accept the IP addresses that the
VPN Router will provide.
1. Click the
Start
button. Select
Settings
and open the
Control Panel
.
2. Double-click the
Network
icon.
3. In the
Configuration
window, shown in Figure 5-1, select the
TCP/IP
pro-
tocol line that has been associated with your network card/adapter. If there is
no TCP/IP line listed, go to “Appendix F: Installing the TCP/IP Protocol” to
install the TCP/IP protocol now.
Configuring Your PCs to Connect to the Cable/DSL VPN
Router
Note:
Make sure that a Network Card or Adapter has been successful-
ly installed into each PC on your network.
Note:
These instructions apply only to Windows 95, Windows 98,
and Windows ME machines. For TCP/IP setup under Windows NT,
2000 and XP, please refer to your Windows manual.
Figure 5-1
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