Netopia 3346N-ENT User Guide (en)

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Virtual Private Networks (VPNs)   5-1
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The Netopia Firmware Version 8.6.1 offers IPsec, PPTP, and ATMP tunneling suppor t for Vir tual Private 
Networks (VPN). 
The following topics are covered in this chapter:
Overview
When you make a long distance telephone call from your home to a relative far away, you are creating a private 
network. You can hold a conversation, and exchange information about the happenings on opposite sides of the 
state, or the continent, that you are mutually interested in. When your next door neighbor picks up the phone to 
call her daughter at college, at the same time you are talking to your relatives, your calls don't overlap, but each 
is separate and private. Neither house has a direct wire to the places they call. Both share the same lines on 
the telephone poles (or underground) on the street.
These calls are vir tual private networksVir tual, because they appear to be direct connections between the 
calling and answering par ties, even though they travel over the public wires and switches of the phone 
company; private, because neither pair of calling and answering par ties interacts with the other; and networks
because they exchange information.
Computers can do the same thing; it's called Vir tual Private Networks (VPNs). Equipped with a Netopia Router, 
a single computer or private network (LAN) can establish a private connection with another computer or private 
network over the public network (Internet).