how to create Secure connection between two private networks

If you choose this path, two servers running Routing and Remote Access are configured to send private data securely across the Internet. You must choose this path when you run the Routing and Remote Access Server Setup Wizard on each server. The connection between the two servers can be persistent (always on) or on demand (demand-dial). To configure this type of server in the wizard, click Secure connection between two private networks, and follow the steps. After the wizard completes the steps, you can configure each server with additional options. For example, you can configure which routing protocols each server accepts and the way in which each server routes traffic between the two networks.