Prepare the rp-l2tpd Server
To configure the rp-l2tpd VPN server, we need a Linux system with least of two network interfaces. I use CentOS 5 Linux operating system for my VPN installation. You can also use other Linux’s flavors, but avoid using Fedora Core 8. Fedora Core 8 has some bug in pppd that doesn’t accept the connection from client.
Linux Explore 