Using Amazon Virtual Private Cloud : About Amazon VPC : Using a VPC with a VPN connection to the data center
  
Using a VPC with a VPN connection to the data center
When you connect to the Amazon VPC through a VPN tunnel using either a software or hardware IPSec gateway, you use the highest level of security. In this scenario, the SteelHead-c has a single IP address from the pool of private VPC addresses. Therefore, there is no special configuration required to deploy the SteelHead-c. As long as you connect the SteelHead-c to the Riverbed Cloud Portal, both autodiscovery and auto-reconfiguration (that is, when instances change their IP addresses, the portal automatically detects it) works.
Figure: Using Amazon VPC through a VPN tunnel (without NAT) shows how to deploy SteelHead-c and servers in Amazon VPC with a VPN connection to the data center.
Figure: Using Amazon VPC through a VPN tunnel (without NAT)
In the network shown in Figure: Using Amazon VPC through a VPN tunnel (without NAT), servers in Amazon use private IP addresses. The VPC with VPN tunnel provides an extension of your intranet into AWS.