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RRAS

Windows Server 2003 Configure RRAS (Routing and Remote Access Service) Site to Site VPN

The following are the steps you would need to take if you want to configure a VPN on a Windows 2003 server where you only have a single network card (NIC) exposed to the Internet. What we will do here is configure a site-to-site VPN so that clients can connect securely while still allowing other types of web traffic such as HTTP (port 80) and/or RDP (port 3389) to connect. This method sets up a secure tunnel for clients while allowing other types of web-based services to still be open and exposed on the same network card.