Proxmox

Proxmox is frequently used for it’s ability to mix Linux Containers and Virtual Machines. Containers are ideal for their low overhead, but they use the host’s kernel so you must load the wireguard module there.

Prepare Proxmox

The Wireguard kernel module is now available on proxmox, so all you need to is load it.

apt install wireguard
modprobe wireguard
# This step may no longer be required, but haven't tested
echo "wireguard" >> /etc/modules-load.d/modules.conf

Edit the container’s config

Add the TUN to the lxc[^1] conf file on the host

lxc.mount.entry = /dev/net/tun dev/net/tun none bind create=file