On Thursday 13 November 2025 at 04:53 UTC, a CLDAP reflection targeted a municipal services customer in Central Europe. The attack peaked at 202.1 Gbps and lasted 155 minutes. Traffic originated from 3629 autonomous systems in 77 countries, predominantly a Mirai-derived IoT botnet.
| Vector | CLDAP reflection |
| Peak | 202.1 Gbps |
| Duration | 155 min |
| Time to mitigation | 0.244 s |
| Attack traffic reaching origin | 0.028% |
| Legitimate traffic challenged | 0.20% |
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 37 points of presence.
What the customer saw
A brief increase in p99 latency of 179 ms during the first minute, then normal service.
Recommendations
- Enable authenticated origin pulls.
- Review allow-listed partner ranges quarterly.
- Enable log streaming to your SIEM for faster correlation.
The billing model is what got our finance team on board, honestly.
Good question. We will cover that in a follow-up post.
Thanks — sharing this with our on-call team.
Thanks! Yes — the risk score and its components are included in every log record.