Maybe you should think to add HTTPS Everywhere to your browsers.
HTTPS Everywhere is a Firefox, Chrome, and Opera extension that encrypts your communications with many major websites, making your browsing more secure :
https://www.eff.org/https-everywhere
By the way, if you are using free HotSpot Shield, I know it shows you some advertisements. Maybe you should think to use VPNBook via OpenVPN Client. It is very easy to use, no limit and free, and of course ad-free.
http://www.vpnbook.com/freevpn
Thanks for sharing your config