On Friday 20 March 2026 at 20:37 UTC, a CLDAP reflection targeted a municipal services customer in the Nordics. The attack peaked at 262.4 Gbps and lasted 128 minutes. Traffic originated from 1936 autonomous systems in 113 countries, predominantly a rented booter service.
| Vector | CLDAP reflection |
| Peak | 262.4 Gbps |
| Duration | 128 min |
| Time to mitigation | 0.146 s |
| Attack traffic reaching origin | 0.036% |
| Legitimate traffic challenged | 0.33% |
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 37 points of presence.
What the customer saw
The customer’s status page stayed green throughout; they learned about the attack from our notification.
Recommendations
- Add a dedicated rate limit for the targeted route.
- Review allow-listed partner ranges quarterly.
- Enable log streaming to your SIEM for faster correlation.
Interesting that most attacks are under ten minutes. Our experience is similar.