VPNs and Windows 2000
Before I get into the discussion of the Windows 2000 VPN, it is important to understand that in the Windows 2000 model, the VPN is an integral part of the Routing and Remote Access utility of Windows 2000. This blurs the lines between the dial-up, routing, and VPN capabilities of Windows 2000. If portions of this section seem as if they are discussing a RAS server, they are. You need to understand the entire model to securely implement the Windows 2000 VPN.
VPN Protocols
The first thing you need to know about Windows 2000 VPN capabilities is that there are two main VPN protocols used in a Windows 2000 VPN:
PPTP (Point-to-Point Tunneling Protocol)— PPTP is Microsoft's legacy protocol for supporting virtual private networks. ...
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