Greetings Dorion,
We appreciate you taking the time to report the trouble you are having to us. There is a thread over in Tech Support here that would be of some use to you where we are investigating issues that might be caused by ISPs classifying FINAL FANTASY XIV: A Realm Reborn as P2P software. We welcome you to add your information there so we can investigate this further. Thank you!

Regards,
Xetyline