Things related to VPN

setting vpn server in xp

source: http://www.aeonity.com/frost/howto-windows-xp-vpn-server-setup

connecting vpn in xp

source: http://compnetworking.about.com/od/windowsxpnetworking/ss/newvpnconnect_8.htm

setting up vpn server in win 7

http://www.computing.net/answers/networking/setting-up-a-vpn-server/34462.html

connecting vpn in ubuntu

source: http://ubuntuforums.org/showthread.php?t=91249