Building a VPN Server
Let's say that your gateway device is going to be a Windows 2000 Server machine. The device should have two Ethernet NICs. One will be connected to your internal network (the intranet), the other to the outside world, which could be a direct connection to the Internet. The gateway device will often be located behind a firewall. As long as the firewall is configured to allow VPN traffic to pass through to the gateway device, there is no problem in having the outside world NIC connected to the firewall.
Inside and outside network segments are often referred to as trusted and untrusted networks, respectively. In the traditional context, a VPN server is set up to allow people from the outside world (say, traveling salespeople) ...
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