2 chances were found to have been attacked by DDoS from more than 4000 IP addresses in Korea

Official opinion was announced about the network trouble which occurred from 18 o'clock on 18th April 2008 from zero corporation hosting 2channel server.

According to it, this failure seems to have occurred at 18 o'clock on April 16, 2008 due to the overloading of the core router of the PIE data center due to DDoS attacks from more than 4000 IP addresses in Korea .

Details are as follows.
April 16
18:00 DDoS attack begins (confirmed by record)
19:00 Confirm network failure
-------- In the meantime the disability gradually expanded
19: 45 Emergency call at our company and PIE data center
20:00 Japanese network enters prime time and network load further rises
-------- Further expansion of disability scale
21:00 Damage caused by DDoS attacks from more than 4000 IP addresses in Korea

April 17
00:25 PIE data center connection difficult
02: 00 Blocking of domestic IP addresses started at PIE data center
02:05 PIE network restoration
02:45 Confirm that all servers from Japan can be accessed normally

Normally the correspondence to these attacks is quick and unprecedented, but this time it was the first day of operation that replaced the core center of the data center with a new one, so the procedure for coping with the attack is different from the conventional procedure, It took time and said that it caused the expansion of obstacles.

For further details please see the statement below.

Statement from PIE data center Jim Watkins (Japanese translation)

Statement from PIE Data Center Jim Watkins (English)

Although the final attack source IP address was domestic, it seems that the purpose, nationality, residential area etc of those who intend to attack are still unknown.