Enable Tun/Tap in Proxmox 4 LXC Containers

In your host server (Where Proxmox is installed)

Replace all the below “$ID” with your container ID (CT id)

Shutdown your container:

pct shutdown $ID

Edit the LXC configuration file

vim /etc/pve/lxc/$ID.conf

Add the following 2 lines at the end of the file

lxc.hook.autodev: /var/lib/lxc/$ID/tuntap
lxc.cgroup.devices.allow = c 10:200 rwm

Create the tuntap file in /var/lib/lxc/$ID

vi /var/lib/lxc/$ID/tuntap

and paste the following in it:

#!/bin/bash
cd ${LXC_ROOTFS_MOUNT}/dev
mkdir net
mknod net/tun c 10 200
chmod 0666 net/tun

Make the tuntap file executable

chmod +x /var/lib/lxc/$ID/tuntap

Start your container:

pct start $ID

cat /dev/net/tun

If Tun/Tap is enabled and active you will see the following message:

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

Questions or Comments? Leave them below!