This is Producer and Director Naoki Yoshida.

Currently, there are DDoS attacks taking place on a heretofore unseen scale upon all NA, EU, and JP FFXIV data centers, purposely timed for each region's peak usage hours.
There was a massive disconnection event earlier in NA due to this, and we apologize for the inconvenience caused to our players.

The development and infrastructure teams are working together with the upstream Internet Service Providers of each data center to deploy defensive measures. With help from the providers, we are working around the clock to combat the attacks, and to prevent the occurrence of any full-service shutdown.

While deploying these countermeasures, there is a chance that some players will experience lag or unstable connections due to rerouting of connections. We are sorry for any inconvenience this will cause.

We are doing everything we can to prevent a full-service shutdown, and we ask for your patience and understanding as we continue to do our best to address ongoing issues.