On Monday 28 April 2025 at 10:01 UTC, a carpet-bombing UDP flood targeted a ticketing customer in Iberia. The attack peaked at 135.2 Gbps and lasted 110 minutes. Traffic originated from 2925 autonomous systems in 41 countries, predominantly residential proxy networks.
| Vector | carpet-bombing UDP flood |
| Peak | 135.2 Gbps |
| Duration | 110 min |
| Time to mitigation | 0.563 s |
| Attack traffic reaching origin | 0.089% |
| Legitimate traffic challenged | 0.08% |
Timeline
The attack was preceded by a breaking political story. Edge packet filters identified the flood by source port and payload signature and dropped it at line rate across 24 points of presence.
What the customer saw
A brief increase in p99 latency of 82 ms during the first minute, then normal service.
Recommendations
- Enable authenticated origin pulls.
- Review allow-listed partner ranges quarterly.
- Enable log streaming to your SIEM for faster correlation.
How do you avoid challenging uptime monitors and partners?
Thanks! Yes — the risk score and its components are included in every log record.
The point about origin IPs leaking through certificate transparency logs is underrated.
Interesting that most attacks are under ten minutes. Our experience is similar.