To satisfy most users curiosity, the yesterdays downtime wasn't an attack or anything of the sort, rather a small server issue.
But unfortunately no admins were available to sort the problem sooner.

As the old saying goes "When the admins are away, the mice will play."
And when I say mice I mean Motoko, not Chiya this time.
We apologise for any inconvenience this might have caused you.
The site, forum and tracker should be back online.