vpn client (pptp) inside a jail

[Andras GELANYI]

Hi,

In a case when a pptp client is running a jail would be great. But in my 
opinion it is not possible because of the lack of special interfaces and 
facilities (eg. GRE) in jails.

Anyway. Could someone tell me whether it is possible or not?
Does anyone know a solution for assigning a jail to a trusted network 
through a tunnel without any influence on the base system's networking?

Regards,
Andras