How to Setup VPN server in Windows Server 2008 on Amazon Cloud E2?

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http://serverfault.com – I have servers in Amazon Cloud E2 with Windows Server 2008 R2. I want to setup a VPN server. Can any one guide me? Because as per the MS articles I completed the steps but I am not able to connect the VPN. Any can share or guide me, how to setup a VPN in Windows Server on EC2. (HowTos)