​Original report sent by Richard Weinberg to openvpn-devel.



"I'm facing a strange issue on Windows 8. It happens very often that the TUN/TAP adapter is not started and OpenVPN is unable to setup IPs and routes.



openvpn.exe writes over and over "Waiting for TUN/TAP interface to come up...". After ~30 seconds it continues without a proper network configuration. This is very nasty because from the users point of few it looks like the tunnel is up but nothing works.



On the net I found some halve baked "solutions" for that issue. Like disabling the Windows Firewall, disabling IPv6, setting the DHCP-Client service to autostart, and so on. But nothing helped so far nor really explained the root issue.



Please see the attached log file. (It is sightly censored to hide my customers name and public IP.)



I ran also Wireshark on my TUN/TAP device while connecting. When facing the issue zero packets were captured. So, it is not really a networking issue between server and client.

