Hello, Tamers.

First of all, I apologize about the inconvenience.
We found that the connection to server was blocked as log-in server was not functioning normally for about an hour.
23:10 ~ 00:10 (GMT+9) / 14:10 ~ 15:10 (GMT) / 09:30 ~ 10:10 (EST) / 06:30 ~ 07:10 (PST)
However, the server has been restored and the problem of connection has been resolved.
So you can be rest assured and log-in to the servers normally again now.
Once again, sorry for the inconvenience.

Thank you.