The deployment of site-to-site VPN connections using Windows Server 2008 consists of the following tasks:
Configuring Internet infrastructure
Configuring Active Directory for user accounts and groups
Configuring RADIUS servers
Deploying the answering routers
Deploying the calling routers
Configuring site network infrastructure
Configuring intersite network infrastructure
You must deploy certificates if you are using the following:
L2TP/IPsec connections with certificate authentication. Each VPN router computer needs a computer certificate.
EAP-TLS authentication with registry-based user certificates. Each calling router needs a user certificate, and each authentication server ...