Amazon EC2 user-data file for automatic configuration of IPsec/L2TP VPN server on a Ubuntu or Debian instance. Tested with Ubuntu 14.04 & 12.04 and Debian 8 (Jessie).
With minor modifications, this script can also be used on dedicated servers or any KVM- or XEN- based Virtual Private Server (VPS) from other providers.
Workaround for Debian 7 (Wheezy)
Alternative VPN script for CentOS/RHEL
Original post by Thomas Sarlandie