Before I forget it again, here some notes about getting OpenVPN to run under Windows Vista:

• Download and install the OpenVPN 2.1_rc7 or newer from OpenVPN Downloads.
• C:\Program Files\OpenVPN\bin\openvpn-gui-1.0.3.exe -> Contextmenü -> Properties -> Compatibility -> activate “Run as administrator” -> Ok

The hostname has to be set in the client example configuration.

The X.509 certificates are needed to create a trustpath from the client to the server. OpenVPN has toolage for this and a simple Certificate Authority can be setup easily. Client authentication works with username and password via PAM.

Just copy the config file and the certificate authority’s certificate to C:\Program Files\OpenVPN\config\foo.ovpn. Now it is available as “foo” entry in the OpenVPN GUI.

Now it’s ready to rock’n'roll.