Response Time as Diagnosis: How a 4.7ms Clue Revealed Filestash's Hidden Config Swap

Response time patterns serve as powerful diagnostic signals in infrastructure troubleshooting—a mere 4.7ms response revealed that credentials never reached the SSH server, instantly shifting focus from network issues to configuration errors. This case study demonstrates how containerized deployments can obscure misconfigurations and why direct inspection of decrypted settings is essential for effective debugging. The technique of using timing data as a diagnostic lens applies broadly to authentication and integration challenges across modern infrastructure.