Quillpike FixStep-by-step fixes for n8n, Cloudflare Tunnel, nginx and Docker errors. Every error is reproduced with Docker Compose, with exact commands and versions.https://fix.quillpike.com/enCloudflare Tunnel: 502 from a localhost Ingress, and a Redirect Loop That Switching SSL Mode Did Not Fixhttps://fix.quillpike.com/cloudflare-tunnel-502-redirect-loop/https://fix.quillpike.com/cloudflare-tunnel-502-redirect-loop/Cloudflare Tunnel returns 502 with a localhost ingress in Docker, then ERR_TOO_MANY_REDIRECTS. Reproduced with cloudflared 2025.10.0 and nginx: both fixes.Thu, 29 Oct 2026 00:00:00 GMTCloudflare Tunnelcloudflarednginxdockerredirectsn8n Behind nginx: 'Connection lost' and 'Invalid origin!' on a Non-Default Port ($host vs $http_host)https://fix.quillpike.com/n8n-invalid-origin-connection-lost/https://fix.quillpike.com/n8n-invalid-origin-connection-lost/n8n shows Connection lost and logs Invalid origin! behind nginx on a non-default port. Reproduced on n8n 2.44.7: use Host $http_host, not $host.Thu, 29 Oct 2026 00:00:00 GMTn8nnginxreverse proxywebsocketdockern8n 'Configured to Use a Secure Cookie' Warning Behind nginx: Redirect HTTP to HTTPShttps://fix.quillpike.com/n8n-secure-cookie-warning/https://fix.quillpike.com/n8n-secure-cookie-warning/n8n shows 'configured to use a secure cookie' when opened over plain HTTP behind nginx. Reproduced on n8n 2.44.7: a 301 to HTTPS fixes it.Thu, 29 Oct 2026 00:00:00 GMTn8nnginxreverse proxyhttpsdockern8n Webhook Returns 404 Behind nginx (Sub-Path Proxy): The Trailing Slash in proxy_passhttps://fix.quillpike.com/n8n-webhook-404-reverse-proxy/https://fix.quillpike.com/n8n-webhook-404-reverse-proxy/n8n webhook returns 404 "Cannot POST /n8n/webhook/..." behind nginx on a sub-path. Reproduced on n8n 2.44.7: one trailing slash in proxy_pass fixes it.Thu, 29 Oct 2026 00:00:00 GMTn8nnginxreverse proxywebhooksdocker