Project Describe:
Fang is a Free vpn server application can change user's Internet Public IP in everytime dialing. Totaly free.
250 connected VPN users supported by every VM instance, and you can run 10 more VMs on a server.
if you wannna change your Real Internet IP very frequently, or your trace wanna be looked like from a lot of users it can help you
a VM with linux will be recommended; a lot of ISP's pppoe accounts of the area where this VM come from; an engineer familiar with linux maintenence