I apologize, there was an error in our rc.local that did not finish so the tun module did not get loaded, I have confirmed tun functionality on both the node and your container.
[root@vps ~]# cat /dev/net/tun
cat: /dev/net/tun: No such device
[root@vps ~]# cat /dev/ppp
cat: /dev/ppp: No such device or address
[root@vps ~]# /usr/sbin/pppd
/usr/sbin/pppd: This system lacks kernel support for PPP. This could be because
the PPP kernel module could not be loaded, or because PPP was not
included in the kernel configuration. If PPP was included as a
module, try `/sbin/modprobe -v ppp'. If that fails, check that
ppp.o exists in /lib/modules/`uname -r`/net.
See README.linux file in the ppp distribution for more details.