SB Technology Corp.
＞Please check here for the first report.
＞Please check here for the final report.
SB Technology Corp. (hereinafter referred to as the Company) has been experiencing a problem (this problem) in which the Internet access service and email service of Local Government Information Security Cloud were unavailable from 4:27 on August 8th, but as of 2:30 p.m. The system was gradually restored, and full recovery was confirmed around 1:30 on August 9th. We will provide an overview of the failure, the process from the occurrence of the failure to recovery, and the location of the failure.
We deeply apologize for the great concern and inconvenience this has caused to our customers and many other stakeholders.
1. Fault overview
Affected time: August 8th (Monday) 4:27am to August 9th (Tuesday) 1:30am
Scope of impact: Internet access services and email used by approximately 190,000 local government employees in nine prefectures: Aomori, Iwate, Miyagi, Akita, Fukushima, Niigata, Tochigi, Saga, and Nagasaki, as well as each municipality. service
2. History from failure occurrence to recovery
| Monday, August 8th | 4：27 | A failure occurs in the communication equipment and virtualization infrastructure that make up the network, making Internet access services and email services unavailable. |
|---|---|---|
| 5：41 | We will notify affected prefectures, municipalities, and organizations of the problem on the local government service portal. | |
| 6：20～ | As communication with the operation management system was interrupted, our workers entered the data center and began an investigation. Confirm that the cause of the failure is not due to unauthorized access. We individually checked the status of the communication equipment, virtualization infrastructure, and mail system that make up the network, but found no abnormalities, so we restarted the communication equipment, switched to backup, and reconfigured the cluster of the virtualization infrastructure. | |
| 14：30～ | Internet access service and email service will be gradually restored. | |
| Tuesday, August 9th | Around 1:30 | We have confirmed that internet access services and email services have been restored in each prefecture and each municipality. |
3. About the failure location
Emails sent and received pass through the firewall, DMZ switch, and are delivered from the email relay server to the destination. At that time, the mail relay server communicates with the spam quarantine server via the DMZ switch and the server aggregation switch.
When browsing the Internet, the connection goes from the firewall to the server aggregation switch, then to the proxy server, then through the server aggregation switch again, and then from the firewall to the Internet.
Communication was cut off due to a failure in the server aggregation switch that is the aggregation point for these routes, making it impossible to send and receive emails and browse the Internet.
We will continue to investigate this issue and consider measures to prevent recurrence.
Contact information regarding this matter
● Yoshida, Corporate Communication Group, SB Technology Corp.
E-mail: sbt-pr@tech.softbank.co.jp
Tel: 03-6892-3063 (Weekdays 9:00-17:45)
