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#ssl

2 stories

Banner: Cloudflare Flexible SSL and an origin HTTPS redirect creating an endless redirect loop

Networking & DNS Bug Report

Cloudflare ERR_TOO_MANY_REDIRECTS with Flexible SSL and an HTTPS-forcing origin

Daniel Tran · Feb 6, 2025 · 8 min read

Minutes after we proxied our marketing site through Cloudflare, every visitor hit ERR_TOO_MANY_REDIRECTS. Cloudflare's Flexible mode spoke plain HTTP to an origin that redirected all HTTP to HTTPS. Full (strict) with an origin certificate ended the loop.

Banner: TLS certificate chain missing its intermediate certificate, breaking Android and curl clients

Networking & DNS Bug Report

SSL works in Chrome but fails on Android and curl: incomplete certificate chain

Daniel Tran · Dec 19, 2024 · 8 min read

Our API certificate renewal looked perfect in desktop Chrome, yet the Android app, curl and a partner's Java service all rejected it. The server sent only the leaf certificate without the intermediate. Serving the full chain fixed every client at once.