No /dev/net/tun inside LXC container

LXC
13

These are steps how to enable TUN/TAP on Proxmox LXC containers:

  1. Make sure your container is PRIVILEGED, if not, then make a backup of the container, then restore it and check “Privileged Container”.

  2. Shutdown container and edit its configuration file located under /etc/pve/lxc/CTID.conf (CTID is the ID of your container)

  3. Add following lines at the end of file:

lxc.cgroup.devices.allow: c 10:200 rwm
lxc.hook.autodev: sh -c “modprobe tun; cd ${LXC_ROOTFS_MOUNT}/dev; mkdir net; mknod net/tun c 10 200; chmod 0666 net/tun”

  1. Save configuration file and start the container.
  2. Make sure TUN is enabled by running following command:

cat /dev/net/tun

This should output the following:

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

Now you can run VPN.