On June 12 2025, Fasterize experienced a service disruption for a subset of customers due to a large-scale DDoS attack. From 15:31 to 15:42 (UTC+2) the surge in traffic overloaded the zone’s load balancers, resulting in a temporary fallback to origin servers for affected sites. Total outage time was 11 minutes, with full platform stability restored at 15:42.
The volumetric DDoS flooded the load balancers, driving CPU utilisation to 100 %. Although our automatic health-check mechanism successfully redirected traffic to customer origin servers (for those customers' whose stack permits this automatic redirection), the repeated load-balancer restarts caused an 11-minute service degradation for sites relying on that zone.
We had increased load-balancer capacity after a similar event on May 15, but this proved insufficient for the size of yesterday’s attack, highlighting a design limitation in relying on provider-managed load balancers.
During the incident, visitors to impacted sites experienced 502 errors until they were served directly from origin infrastructure, potentially experiencing higher latency.