jails and pptp

[Glenn Dawson]

I have a client that wants to run a pptp server inside a jail which I 
host.  As far as I can tell, this isn't really possible.  poptop and mpd 
both use facilties that aren't available inside a jail.

I'm wondering if anyone can give me a good explanation that I can use to 
tell him why this isn't possible.  Or, if someone can tell me that it is 
possible and give me some links or pointers as to how to make it work.

Thanks in advance.

-Glenn