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Jupyter Kernel Connection Error: Causes and Fixes - Fix PostgreSQL Connection Refused Due to Firewall-How to resolve unknown directive server_name in Nginx

2026-06-13 13:50:08
Jupyter Kernel Connection Error: Causes and Fixes - Fix PostgreSQL Connection Refused Due to Firewall-How to resolve unknown directive server_name in Nginx

Result check

  • Keep one change per test run so you know which step helped.
  • Undo temporary changes after the issue is confirmed.

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