Prerequisites
Some prerequisites have to be fulfilled if you want to install OpenVPN on your system. Windows users must use Windows 2000 or XP; Mac OS X is required on Apple platforms. This is all that is required for these operating systems, but Linux/UNIX systems must meet the following demands:
Your system must provide support for the Universal TUN/TAP driver:
The kernels newer than version 2.4 of almost all modern Linux distributions provide support for TUN/TAP devices. Only if you are using an old distribution or if you have built your own kernel, will you have to add this support to your configuration. The section of this chapter Enabling Linux Kernel Support for TUN/TAP Devices, deals with this problem. This project's website can be found at: http://vtun.sourceforge.net/tun/.
OpenSSL Libraries have to be installed on your system:
I have not encountered modern Linux/UNIX systems that do not meet this requirement. However, if you want to compile OpenVPN from source code, the SSL development...
