Maritime Computer Emergency Response Team ADMIRAL dataset ADMIRAL dataset

Publicly disclosed information for this event

Index Number:
The website of the Italian ports in the Tyrrhenian Sea is victim of a denial of service attack [...]
Day Month Year Country Activity Incident Type
9 June 2023 Italy Port Denial of Service


According to sources, the Authority of Port System successfully defended against Distributed Denial of Service (DDoS) attacks that targeted Italian port authorities' Internet servers. While other Italian port authorities experienced temporary outages due to DDoS attacks that flood computer systems with abnormal traffic requests, the victim managed to withstand the attacks.

The attacks lasted for several days and produced a sustained traffic volume of more than 10 million requests per hour (with peaks of 13 million per hour). The port utilized previously installed protection systems and implemented additional security configurations during the peak attack phase to ensure normal website access while blocking or limiting potentially harmful traffic.


AdSP of the Tyrrhenian Sea Northern

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.
ADMIRAL is licensed under the Creative Commons CC-BY-NC license. Copyright © France Cyber Maritime 2023.