rapid7/metasploit-framework — pull request #1820 by bmerinofe (2013-05-12 14:49:50+00:00)
Title: Added post module to get a MITM through a pptp tunnel

The module creates an outboud VPN connection (pptp) to a VPN server using the rasdial Windows client. We can choice to forward all victim traffic through the tunnel getting a man-in-the-middle attack.

I have done the tests using pptpd as a VPN server in a Debian 6 machine.
Added a how-to video in the references.