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Traefik as a reverse proxy: middleware chains for CORS and TLS
Traefik middleware can inject CORS headers per router; order with auth and compression matters.
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traefikproxycors
Middleware ordering
Place CORS after authentication middleware if you need user-aware origin checks.
Compress middleware should usually run after CORS headers are finalized to avoid mismatched Vary.
Observability
Enable access logs with Origin field for debugging partner integrations.
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