On Saturday 2 August 2025 at 13:35 UTC, a CLDAP reflection targeted a fashion retail customer in the Benelux. The attack peaked at 130.8 Gbps and lasted 9 minutes. Traffic originated from 1540 autonomous systems in 30 countries, predominantly compromised cloud VMs.
| Vector | CLDAP reflection |
| Peak | 130.8 Gbps |
| Duration | 9 min |
| Time to mitigation | 0.029 s |
| Attack traffic reaching origin | 0.067% |
| Legitimate traffic challenged | 0.15% |
Timeline
The attack was preceded by a ransom note demanding payment in Monero. Edge packet filters identified the flood by source port and payload signature and dropped it at line rate across 12 points of presence.
What the customer saw
Checkout conversion was unchanged compared with the same hour of the previous week.
Recommendations
- Add a dedicated rate limit for the targeted route.
- Keep origin IPs out of public DNS history.
- Enable authenticated origin pulls.