Pd is the best vpn tunneling software i have ever seen. It gives u daily 100 mb of free net without any dollar .It means u can use free 3gb net every month .U can download it from here. PD-Proxy VPN Service .Now i will tell how u will tell u how u can upgrade it for 3 months premium service. 1]first u have to write a post in a blog ,forum about pd proxy in atleast 150 word giving headline of pd proxy vpn service with a page rank of atleast 1 of the blog. 2]u have give direct link pd proxy ie, http://www.pdproxy.com 3]then u have to email them about ur post includings ur id details here firstname.lastname@example.org . Then they should check it and give u 3 month free pd proxy vpn premium account .so get ready to use 3 month free net without any limit .And they have 2 demo server .2nd one is for nigerian users. u should coonect it with udp or icmp server . but udp is first . so enjoy friends and be happy .