website next week for routine maintenance, concrete until further notice

We will shut down our site for scheduled maintenance on 2017-04-24.Opening time to be informed later.
Sorry for the inconvenience.

yesterday afternoon to evening, CDN domain name used by DDoS attacks, resulting in been affected, unable to go to the website and tracker situation arise. The relevant circumstances CDN service provider was informed by mail later time. because CDN hosting service providers therefore unaffected on another.
Inconvenience, please understand.