The server is currently under a heavy DDoS attack. We are working with our network engineers to resolve the issue.
2014-10-10 06:06 UTC: Web404 is back online.
2014-10-10 12:30 UTC: The server has been placed under our mitigation system which has improved the situation, but packet loss and other network problems are still to be expected. We will keep monitoring the server.
2014-10-10 15:30 UTC: We have removed the mitigation system since the DDoS attack has subsided.