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The Information Services` infrastructure has managed to neutralize over 400 hostile attempts in the last 3 days. At times, the malicious traffic to the National Health Information System (NHIS) exceeded 400 Gbps, which exceeds the international connectivity of the country. The unprecedented distributed denial-of-service (DDoS) attack on the https://his.bg/ portal reached 30 to 80 million packets per second within peak hours, making it hard for users to access. The company has provided the most effective and modern protection of the infrastructure from such actions and has successfully managed to repel malicious attacks.