🛠️ Incident Description

On Tuesday, September 9th, 2025, Fasterize carried out a scheduled maintenance to modernize part of its private network infrastructure.

During this operation, an unexpected configuration issue temporarily disrupted communication between some components of the platform. This resulted in an increased error rate on part of the traffic between 11:43 and 11:50 (Paris time).

📅 Timeline

• 11:40 – Update started on the first batch of machines
  
• 11:43 – Anomaly detected in communication between proxies and fronts
  
• 11:50 – Issue mitigated, service returned to normal
  

✅ Immediate Actions

• Affected machines were taken out of rotation
  
• Healthy machines were reactivated to absorb the traffic
  
• Service stabilized within minutes of the anomaly
  

🚀 Next Steps

• Strengthening our validation procedures during network migrations
  
• Adding automated connectivity tests to detect similar issues earlier
  
• Improving documentation and standardization of network configurations to minimize future risks