VPN for Amazon Web Services (AWS) EC2 (Elastic Cloud Computing)
We have successfully setup VPN access to an EC2 Windows instance via OpenVPN.
Just follow the instructions described here.
Remember to open UDP port 1194 via the AWS console (security groups) for it to work
We have created multiple clients and they are simultaneously able to access the vpn.
This enables you to access your server as if it were in your LAN while simultaneously enjoying the stability and security of AWS.