# Macos – Using OpenVPN from Mac OSX Terminal, cannot load Tun/Tap

kextmacosopenvpntunnel

I am looking to use OpenVPN straight from the terminal instead of using a gui such as tunnelblick – but am encountering a couple of problems. I have tested my config file and it works fine so it is not the config fault.

The command I am running is

./openvpn connection.ovpn


The error message that I am getting is

Wed Mar  6 13:22:57 2013 us=528389 Cannot allocate TUN/TAP dev dynamically
Wed Mar  6 13:22:57 2013 us=528401 Exiting due to fatal error


Which seems to be implying that a tun/tap kext cannot be found. I have tried to run the command

sudo kextload tun.kext


immediately prior to this and it seemed to load fine but I still get the above error. I am using the 64-bit tun.kext from the TunnelBlick project so it should not be a problem with the kext itself. Any ideas?

sudo ./openvpn connection.ovpn