Jul 28, 2014
Installing OpenVPN on Ubuntu Server 12.04 or 14.04 using TUN Plus, TUN based VPNs are supported by Android (TAP is not as of 4.2.2). OpenVPN has a few methods of authentication. Out of the box, OpenVPN relies on certificate based auth. However, with a recompiled client, you can also use Id/password authentication as well providing 2 factor auth into your network (something you have = the cert, something All TAP-Win32 adapters on this system are currently in use During the installation, the installer does NOT ask you if its okay to install an non-digitally signed driver from OpenVPN. Therefore the TAP-Win32 Adapter does not get installed properly. That's why it would not show up under Network Connections. No TAP adapter means that OpenVPN will not be able to connect.
What is: TAP Windows Adapter V9 and How to Remove it
Mar 30, 2011
To solve the issue, you need to re-enable the adapter or reinstall the driver. Solution 1: re-enable the adapter Open Control Panel > Network and Internet > Network and Sharing Center > Change adapter settings. Check description of network adapters to find the Tap-Windows Adapter. Right click on it > Disable. Right click again > Enable.
OpenVPN + Windows 8.1 = Issues with TAP | ServeTheHome … Nov 20, 2013 OpenVPN TUN Adapter and Windows 7's Firewall Dec 13, 2012 OpenVPN Error: All TAP-Windows adapters on this system are