I am using docker on Windows with virtualbox driver. I build a docker container based on ubuntu:wily, and install some packages like pptp-linux and openssh-server.
I ssh into this container, and did
mknod /dev/ppp c 108 0, and the node was created with no error. Then I did
pppd call my-vpn, but I got:
Couldn't open the /dev/ppp device: Operation not permitted pppd: Sorry - this system lacks PPP kernel support
Do I miss any package in the container? Please help.