📖 Original Reference: Originally published with full architecture diagrams and server configuration templates at alexmaina.dev/wordpress-docker-redirect-loop .

Running WordPress inside Docker behind a reverse proxy (like Nginx Proxy Manager , Traefik , Caddy , or Cloudflare ) often leads to the dreaded browser error:

ERR_TOO_MANY_REDIRECTS

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The browser gets trapped in an infinite HTTP 301 loop. Here is why this happens and how to permanently fix it in under 60 seconds.

⚡ The 30-Second Solution

Open your WordPress volume mount and edit wp-config.php . Paste this snippet BEFORE the line /* That's all, stop editing! Happy publishing.…