TUN Module Loaded but OpenVPN /dev/net/tun no such file or directory

Question

lsmod -> tun 16587 0 - Live 0xbf0e1000

Openvpn error: Cannot open TUN/TAP dev /dev/net/tun no such file or directory

I tried creating a dummy directory but the error changes to Cannot open TUN/TAP dev /dev/net/tun: Is a directory.

edit: System: ARM Linux 3.10.0

John Doe · Accepted Answer · 2019-02-18 17:18:40Z

2

/dev/net/tun is character device not file nor directory. Check it with ls command:

ls -lad /dev/net/tun

It shall look like (notice first c):

crw-rw-rw- 1 root root 10, 200 Feb 10 21:38 /dev/net/tun

To fix unload tun module:

rmmod tun

remove /dev/net/tun directory if it exist (directory is marked with d instead of c):

rmdir /dev/net/tun

Reload tun module:

modprobe tun

It shall create character device /dev/net/tun.

answered Feb 18, 2019 at 17:18

John Doe

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Jeff Schaller · Accepted Answer · 2019-07-26 02:14:31Z

1

This worked for me on Puppy Linux Xenial x64:

Note: If the VPN cannot start for you and you are getting this output:

ERROR: Cannot open TUN/TAP dev /dev/net/tun: No such file or directory (errno=2)

Then do the following:

mkdir -p /dev/net
mknod /dev/net/tun c 10 200
chmod 600 /dev/net/tun
cat /dev/net/tun

If you receive the message:

cat: /dev/net/tun: File descriptor in bad state

That means your TUN/TAP device is ready for use.

Jeff Schaller♦

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answered Jul 25, 2019 at 23:47

physicsgeek

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2 Answers 2