OpenVPN access server on Amazon VPC vs free version

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Maybe I'm missing the point, but I'd like to setup simple VPN access with software VPN to access my private network on Amazon VPC. I thought OpenVPN would be a great solution for this, and I thought it might make sense to put this on the NAT instance that comes with VPC so I don't have to spend money on another instance. Is there any advantage to running the following: http://www.openvpn.net/index.php?option=com_content&id=493 vs sticking to the free solution of OpenVPN? What does one offer over the other? Any reason not to run this on the NAT instance itself?

Best Answer

OpenVPN access server adds a few bells and whistles like a software download page and a web ui console.

http://openvpn.net/index.php/access-server/as-advantages.html