On Sunday 5 April 2026 at 13:46 UTC, a CLDAP reflection targeted a airline booking customer in the Nordics. The attack peaked at 101.2 Gbps and lasted 172 minutes. Traffic originated from 580 autonomous systems in 27 countries, predominantly a headless-browser farm.
| Vector | CLDAP reflection |
| Peak | 101.2 Gbps |
| Duration | 172 min |
| Time to mitigation | 0.811 s |
| Attack traffic reaching origin | 0.032% |
| Legitimate traffic challenged | 0.31% |
Timeline
The attack was preceded by a competitor’s product launch. Edge packet filters identified the flood by source port and payload signature and dropped it at line rate across 13 points of presence.
What the customer saw
The customer’s status page stayed green throughout; they learned about the attack from our notification.
Recommendations
- Enable log streaming to your SIEM for faster correlation.
- Lower challenge thresholds on authentication endpoints during high-risk events.
- Keep origin IPs out of public DNS history.