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Chapter 3: Planning Your Virtual Private Network (VPN)
What is a VPN?
Wireless-G VPN Router with RangeBooster
data to a new destination. Even though the data is not received by its intended recipient, it appears that way to
the person sending the data.
These are only a few of the methods hackers use and they are always developing more. Without the security of
your VPN, your data is constantly open to such attacks as it travels over the Internet. Data travelling over the
Internet will often pass through many different servers around the world before reaching its final destination.
That's a long way to go for unsecured data and this is when a VPN serves its purpose.
What is a VPN?
A VPN, or Virtual Private Network, is a connection between two endpoints—a VPN Router, for instance—in
different networks that allows private data to be sent securely over a shared or public network, such as the
Internet. This establishes a private network that can send data securely between these two locations or
networks.
This is done by creating a “tunnel”. A VPN tunnel connects the two PCs or networks and allows data to be
transmitted over the Internet as if it were still within those networks. Not a literal tunnel, it is a connection
secured by encrypting the data sent between the two networks.
VPN was created as a cost-effective alternative to using a private, dedicated, leased line for a private network.
Using industry standard encryption and authentication techniques—IPSec, short for IP Security—the VPN creates
a secure connection that, in effect, operates as if you were directly connected to your local network. Virtual
Private Networking can be used to create secure networks linking a central office with branch offices,
telecommuters, and/or professionals on the road (travelers can connect to a VPN Router using any computer with
the Linksys VPN client software.)
There are two basic ways to create a VPN connection:
•
VPN Router to VPN Router
•
Computer (using the Linksys VPN client software) 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 the Linksys VPN client software can be one of the two endpoints (refer to “Appendix
C: Using the Linksys QuickVPN Software for Windows 2000 or XP”). If you choose not to run the VPN client
software, 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 D: Configuring IPSec between a Windows 2000 or XP PC
encryption
: encoding data transmitted in a network
ip
(internet protocol): a protocol used to send data
over a network
software
: instructions for the computer
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 second VPN
Router or a computer with the Linksys VPN client software.
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