Dwango: floods of traffic against niconico force emergency maintenance and outages

1. 2020-02-16 03:00

   From about this time, abnormal amounts of traffic meant to load the system arrived again and again. [1]

2. 2020-02-17 00:43

   Emergency maintenance took Niconico Douga and other parts offline until 01:15. [1]

3. 2020-03-05

   The Niconico Live streaming service went down; the company called it a persistent attack. [3]

4. 2020-03-07 01:10

   All of niconico became hard or impossible to reach; the company detected abnormal traffic as the cause. [2]

Users could not watch, upload or stream, or could do so only with difficulty; uploads during the emergency maintenance may have failed. [1] [2]

The company said the attack used computers and devices in Japan as stepping stones, and urged people to keep devices updated and to stop using unsupported ones. [3]