Connecting PPTP from container

We need to establish PPTP VPN connection. After trying to sudo pon vpn I’m getting the following error:

Couldn’t open the /dev/ppp device: No such file or directory
modprobe: ERROR: …/libkmod/libkmod.c:556 kmod_search_moddep() could not open moddep file ‘/lib/modules/3.13.0-86-generic/modules.dep.bin’
/usr/sbin/pppd: You need to create the /dev/ppp device node by
executing the following command as root:
mknod /dev/ppp c 108 0

sudo pon returned exit code 4

Running sudo mknod /dev/ppp c 108 0 gives

mknod: ‘/dev/ppp’: Operation not permitted

sudo mknod /dev/ppp c 108 0 returned exit code 1

I believe that running the container in --privileged mode will help. Is there any chance to have this functionality? If not, maybe you have any other suggestions about how to establish VPN connection.