On Wednesday 25 February 2026 at 17:20 UTC, a GRE flood targeted a healthcare portal customer in Latin America. The attack peaked at 100.6 Gbps and lasted 14 minutes. Traffic originated from 2822 autonomous systems in 40 countries, predominantly misconfigured open reflectors.
| Vector | GRE flood |
| Peak | 100.6 Gbps |
| Duration | 14 min |
| Time to mitigation | 0.794 s |
| Attack traffic reaching origin | 0.020% |
| Legitimate traffic challenged | 0.05% |
Timeline
The attack was preceded by no stated motive. Edge packet filters identified the flood by source port and payload signature and dropped it at line rate across 34 points of presence.
What the customer saw
The customer’s status page stayed green throughout; they learned about the attack from our notification.
Recommendations
- Lower challenge thresholds on authentication endpoints during high-risk events.
- Keep origin IPs out of public DNS history.
- Enable log streaming to your SIEM for faster correlation.