Hello, Tamers.

First of all, I apologize about the inconvenience.
We found that the connection to server was blocked due to server malfunction for about an hour.
22:30 ~ 23:30 (GMT+9) / 13:30 ~ 14:30 (GMT) / 08:30 ~ 09:30 (EST) / 05:30 ~ 06:30 (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.