[Users] No Persistent TUN/TAP Devices?

[openvz at bigfatdave.com]

I just got a rather strange message from my (OpenVZ-based) hosting company:

> There are limitations on a VPS container.  One of them is the ability
> to set up persistent devices on your container (Hence the Cannot ioctl
> TUNSETPERSIST(1) tun1: Operation not permitted (errno=1)).  This is not
> by fault but design. While your settings should remain  intact when the
> node reboots, it sometimes does reset them.  We can easily re-enable and
> re-setup when that does happen, but we do not regularly reboot the node.

> However, with the type of access you seem to need, your best bet is
> to order a small dedicated server.  Otherwise, you are limited in the
> amount of control you have on your VPS container.  We can work with you
> to pro-rate any days not used on your VPS over to a dedicated once you
> get it set up and cancel the VPS.

> Thank you for being a valued BurstNET customer.

Now, I run OpenVZ in production on my own hardware, so I know that
the lack of persistent TUN/TAP devices isn't "by design," but obviously
there's some setting that these guys don't know/care about.  Would anybody
care to clue me in, here?