Quote Originally Posted by MisterNublet View Post
It is unlikely its a DDoS attack. Download WinMTR and run a traceroute to the servers. It is very likely you are being routed through NTT which is an absolute trash dump of an ISP company that SE uses and refuses to hold accountable.

If its the case that you are, you (and others) might want to look into a VPN if you want to continue playing FFXIV, because there is no fix in sight.
It's a DDoS. SE just posted it