Maritime Computer Emergency Response Team ADMIRAL dataset ADMIRAL dataset

Publicly disclosed information for this event

Index Number:
The website of a Port Authority is targeted by a Distributed Denial of Service attack.
Day Month Year Country Activity Incident Type
6 September 2022 Japan Port Denial of Service


Pro-Russia hackers have claimed responsibility for launching distributed denial of service (DDoS) attacks on Japanese government and company websites. The attacks, claimed by the group were described by the attacking group as a "declaration of war on the Japanese national government". They temporarily impacted various government websites, including the Nagoya Port Authority's site, which was down for about 40 minutes.


Nagoya Port Authority

Claimed/Reported Threat Actor




Main impact



Recommendations to Port to reduce Denial of Service risks:

  • Implement rate limiting and traffic filtering to mitigate the impact of incoming malicious traffic.
  • Check with your IT service provider that the resilience of its systems against such attack was tested.
  • Regularly monitor network traffic and set up alerting for unusual patterns or spikes.
  • Diversify your server locations and use fail-over systems to ensure service availability in case of an attack.
  • Establish an incident response plan to quickly mitigate and recover from DoS attacks.
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Disclaimer: the data are provided as is. France Cyber Maritime and the M-CERT take no responsibility for the soundness, quality, precision, nor the eventual attribution made by the referenced URLs. We give a lot of respect and support to the victims of attacks.
Files generated on Monday, 11th December 2023.
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