On Thursday 19 October 2023 at 13:35 UTC, a UDP reflection (NTP) targeted a online casino customer in Central Europe. The attack peaked at 150.1 Gbps and lasted 167 minutes. Traffic originated from 862 autonomous systems in 53 countries, predominantly misconfigured open reflectors.
| Vector | UDP reflection (NTP) |
| Peak | 150.1 Gbps |
| Duration | 167 min |
| Time to mitigation | 0.101 s |
| Attack traffic reaching origin | 0.088% |
| Legitimate traffic challenged | 0.40% |
Timeline
The attack was preceded by a hacktivist channel announcing the target. Edge packet filters identified the flood by source port and payload signature and dropped it at line rate across 39 points of presence.
What the customer saw
No customer-visible impact. The on-call engineer was notified and acknowledged the incident from the dashboard.
Recommendations
- Lower challenge thresholds on authentication endpoints during high-risk events.
- Review allow-listed partner ranges quarterly.
- Keep origin IPs out of public DNS history.
How does the proof-of-work challenge behave on older Android devices? Any numbers below Android 10?
This matches what we see in iGaming around big matches.
How does the proof-of-work challenge behave on older Android devices? Any numbers below Android 10?
Great to hear, thanks for sharing your experience.