What ports should be open on router/firewall for it to work?
None should be open, but your ISP must allow GRE protocol. In most cases you won’t experience any problems connecting to our proXPN servers from any place, and in the event that you do, contact our support department. Q: Does it also protect other protocols like Skype, Yahoo Messenger, ICQ, Mail or FTP. A: Once you are connected to our proXPN servers, all programs will work find and be protected from intrusion or people spying on your programs connected to the internet.