On Friday 4 April 2025 at 22:32 UTC, a GRE flood targeted a ticketing customer in Latin America. The attack peaked at 354.8 Gbps and lasted 128 minutes. Traffic originated from 2256 autonomous systems in 31 countries, predominantly a headless-browser farm.
| Vector | GRE flood |
| Peak | 354.8 Gbps |
| Duration | 128 min |
| Time to mitigation | 0.526 s |
| Attack traffic reaching origin | 0.023% |
| Legitimate traffic challenged | 0.27% |
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 33 points of presence.
What the customer saw
The customer’s status page stayed green throughout; they learned about the attack from our notification.
Recommendations
- Review allow-listed partner ranges quarterly.
- Add a dedicated rate limit for the targeted route.
- Enable log streaming to your SIEM for faster correlation.
Do you publish the edge IP ranges in a machine-readable format?