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Fix PuTTY Network Error: Connection Refused on Ubuntu - Teams DNS Sync Troubleshooting Guide-How to Resolve Teams SSL Certificate Chain Incomplete Error

2026-06-13 23:02:36developer-tools
Fix PuTTY Network Error: Connection Refused on Ubuntu - Teams DNS Sync Troubleshooting Guide-How to Resolve Teams SSL Certificate Chain Incomplete Error

Final checklist

  • Confirm that the same symptom is gone after a restart or refresh.
  • Keep the smallest working change and undo temporary diagnostic settings.