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2 stories

Banner: a generated configuration file doubling in size and overflowing a fixed-size container in a network proxy

Networking & DNS

Cloudflare's November 18, 2025 outage: what happened and lessons for our own systems

Daniel Tran · Dec 2, 2025 · 9 min read

A summary of Cloudflare's official postmortem for the November 18, 2025 outage: a database permission change doubled a generated feature file, which crossed a hard limit and crashed the proxy. Plus the lessons we are applying to our own config pipelines.

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.