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Fix Nginx Config Test Fails with 'upstream host not found' - Troubleshooting Docker Nginx 502 Bad Gateway-Android WireGuard Handshake Not Working Guide

2026-06-13 15:04:59
Fix Nginx Config Test Fails with 'upstream host not found' - Troubleshooting Docker Nginx 502 Bad Gateway-Android WireGuard Handshake Not Working Guide

Result check

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