Billion Electric Company BiGuard 50G - Manual (Page 31)

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2.6 Virtual Private Networking
A Virtual Private Network (VPN) enables you to send data between two computers
across a shared or public network in a manner that emulates the properties of a
point-to-point private link. As such, it is perfect for connecting branch offices to
headquarters across the Internet in a secure fashion.
The following section discusses Virtual Private Networking with BiGuard 50G.
2.6.1 General VPN Setup
There are typically three different VPN scenarios. The first is a Gateway to
Gateway setup, where two remote gateways communicate over the Internet via a
secure tunnel.
The next type of VPN setup is the Gateway to Multiple Gateway setup, where one
gateway (Headquarters) is communicating with multiple gateways (Branch Offices)
over the Internet. As with all VPNs, data is kept secure with secure tunnels.
The final type of VPN setup is the Client to Gateway. A good example of where this
can be applied is when a remote sales person accesses the corporate network over
a secure VPN tunnel.