We have received feedback from our networking department that the router
on your network received a denial of service attack causing the packet
As the source of the problem has dissolved, the connectivity should
return to normal in the next hour, if it doesn't don't hesitate to contact.
LeaseWeb - Technical Support
After 3 days of sending mails.
Some guy DoS'ing a router. Killing lots of sites for only a small percentage (because they only killed one router that lead to this (and many other) sites instead of all of them).
Fail skiddy is fail.