How to load tun module in linux?
This answer is probably a bit late, but I ran into the problem, exactly as described, myself.
Running OpenVPN would produce:
Note: Cannot open TUN/TAP dev /dev/net/tun: No such file or directory (errno=2)
And running tunctl
would produce:
Failed to open '/dev/net/tun' : No such file or directory
And this command had no output:
lsmod | grep tun
When attempting to add the tun
module via:
modprobe tun
modprobe
would exit with a failure error code (1), and nothing changed.
I found an alternate way of activating the tun module via insmod
. First locate the module with this command:
find /lib/modules/ -iname 'tun.ko.gz'
Then use insmod with the returned path (I only got one match), for example:
insmod /lib/modules/3.6.9-1-ARCH/kernel/drivers/net/tun.ko.gz
For me, running that command worked, and tunctl
and OpenVPN worked okay afterwards.
I ran into a similar problem when trying to run openvpn on OVH Cloud VPS, openvpn complains that cannot find TUN interface.
modprobe will always return module not found :
$ sudo modprobe tun
FATAL: Module tun not found.
Finally, I found that tun is not a module but built in kernel, so what I do to solve was created the missing dir and nod:
$ sudo mkdir /dev/net
$ sudo mknod /dev/net/tun c 10 200
And then openvpn can find and use the tun device.
To be noted that afterward, modprobe will still return an error, because tun is not a module.
$ sudo modprobe tun
FATAL: Module tun not found.
In Arch linux installing the networkmanager-vpnc
package will solve the problem