KFF was down yesterday evening, with problems continuing into the night. It was not an issue with the server, but with the data center providing connectivity. Directly from the service provider:

Our Networks Operation team uncovered a bug in firmware utilized in our vendorís hardware that caused the network issues, which impacted some of our customers. We worked closely with the vendor to establish and implement a bug fix. That fix is now being executed and propagating across the network. During this rollout, you may find some performance inconsistencies, which will resolve fairly quickly. Our entire team remains engaged and committing to fully restoring services and performance for all impacted customers.