OpenVPN and local users

[wagnbeu0]

Hi, I successfully installed OpenVPN on Windows Server 2008. I want a bridged network, and users must also authenticate using certificates and username/password.

Here is my manual:
http://www.ben-wagner.de/pages/manual106/computer-edv/openvpn-server-unter-windows-server-installieren.php

To allow users to login I use in my current configuration a textfile which contains all the users and their passwords.
From a security perspective it would be much more safer if I can use a local existing windows group so all I have to do is adding or removing local windows users to that specific group.

So what do I have to change in my server configuration that connecting clients will ask for username and password and check it against the local windows server instead of the local textfile?

[TinCanTech]

Try this:
https://github.com/threerings/openvpn-auth-ldap