!! PPTP

pptp is another type of VPN, similar to ipsec/Freeswan.
the debian package needed is pptp-linux.
Also referred to as poptop.

Setting up a pptp server is relatively simple (details to come).
To enable encryption you need to patch the kernel for mppe (microsofts encryption).
configuration can be found here..

http://pptpclient.sourceforge.net/howto-debian.phtml

More to come.