How do I diagnose an ECONNRESET error in my Node.js application?

Diagnosing ECONNRESET requires checking server logs for any indications of the connection being closed. Examine client-side logs for any errors or warnings related to the connection. Use network monitoring tools (like `tcpdump` or Wireshark) to analyze network traffic and identify any anomalies. Also, use your application's logging framework to track connection attempts and responses.