Thank you for the reply Tokorai.

There are a few things that you can try and resolve the issue:

-Reset your router by turning it off for a few minutes, then back on.

-Check the following Port Ranges on your router/modem to ensure that the following Port Ranges have been opened:
▼TCP
54992 through 54994,
55006 through 55007,
55021 through 55040
Your ISP may forward these ports for you.

-You can also try a clean boot. Simply open the task manager and select the 'Start up' Tab. Disable everything here and restart the PC.

We hope we can be of assistance in helping you enjoy the exciting world of Final Fantasy XIV!