Network Virtualization is secure and routable

You can create a complete end-to-end network from your corporate datacenter, running on XenServer, through the VPN to the network in the cloud. All servers and hosts communicate securely over SSL VPN.

The best part about this solution is that when one vendor said that virtualization breaks the network, it really doesn’t.

I just did the proof of concept between a Citrix datacenter and Amazon cloud services. Between the Citrix datacenter and the Amazon cloud, I am running a site-to-site SSL VPN. The SSL VPN running at the Citrix datacenter is running inside of XenServer on a Dell 2950 III server, optimized for virtualization.

The SSL VPN Gateway running in the Cloud is also running on Xen as a virtual appliance, or virtual gateway if you will. The Windows Server(s) in the cloud are connected to the SSL VPN using OpenVPN.

The reason for using OpenVPN on the Windows Server(s) to connect to the SSL VPN Gateway in the Cloud is twofold:

  1. Amazon doesn’t allow the reconfiguration of default gateways on their Amazon Machine Images (AMIs). By configuring the OpenVPN client connection, you can send all traffic from the Windows Server (S3) through the SSL VPN gateway (V2), through the VPN (vtun0) Tunnel, through the SSL VPN gateway (V1) to the private network in the Citrix datacenter AND vice versa.
  2. Provides an extra layer of security for traffic traversing the intra-cloud network.



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