DDoS backscatter の長期変化
ID: 2d20d651-e764-585e-a80d-1ea77d2e183c
STIX ID: report--2d20d651-e764-585e-a80d-1ea77d2e183c
Feed Name: IIJ Security Diary
Threat Score
This report analyzes DDoS backscatter observations from 2015–2020, finding a substantial rise in observed packet volumes while the number of unique targeted IPs did not increase, indicating larger per-incident traffic; it highlights a shift toward attacks using high ephemeral ports and notes that DNS flood backscatter (53/UDP) largely ceased after May 2017, concluding that DDoS activity patterns and TTPs have changed and urging continued DDoS preparedness.
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