On Sunday 28 June 2026 at 03:34 UTC, a SYN flood targeted a electronics retail customer in Latin America. The attack peaked at 30.5 Gbps and lasted 142 minutes. Traffic originated from 3153 autonomous systems in 78 countries, predominantly residential proxy networks.
| Vector | SYN flood |
| Peak | 30.5 Gbps |
| Duration | 142 min |
| Time to mitigation | 0.244 s |
| Attack traffic reaching origin | 0.032% |
| Legitimate traffic challenged | 0.23% |
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 30 points of presence.
What the customer saw
A brief increase in p99 latency of 122 ms during the first minute, then normal service.
Recommendations
- Review allow-listed partner ranges quarterly.
- Lower challenge thresholds on authentication endpoints during high-risk events.
- Enable authenticated origin pulls.
Do you publish the edge IP ranges in a machine-readable format?
Solid runbook advice. The DNS-at-2am point hit home.
Could you share the dataset behind the percentages?
Our auditors asked for exactly this kind of incident evidence under DORA.