On Saturday 3:56pm PST (11/11/2017) our SSL infrastructure stack experienced a surge in requests that affected a number of sites hosting on SSL. At 4:45pm PST the infrastructure team started provisioning extra capacity to our SSL stack to handle the load. This was an isolated DDoS attacked directed at one site that caused service disruption to other Webflow hosting customers. The total amount of downtime varied from 25 minutes to 45 minutes for some customers.
We will be taking steps to help isolate sites under attack with various DNS mitigation workflows. We will also continue work on efforts to improve the resiliency of our SSL stack to support the large number of highly trafficked sites transitioning to Webflow Hosting. (Follow up announcement soon).