The 3% Drop That Only Showed Up on a Clean Server: A Debugging Retrospective
My forwarder lost 3% of its messages. My laptop reported zero. CI reported zero. Staging lost thousands every hour. I blamed the network. I blamed t…
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OSI Model - The Internet Is Just Envelopes Thrown Away at Every Router
The wrong mental model For a long time I pictured a packet as a thing. A little sealed capsule that leaves my laptop, hops from router to router, an…
TCP MSS Clamping: Fixing Path MTU Black Holes by Rewriting the SYN
Originally published at https://blog.pathvector.dev/protocol-lab-mss-37/ — part of the free Protocol Lab series. This post is part of Protocol Lab ,…
Visual Guide to TCP at the Transport Layer
I built a detailed visual diagrams for the Transmission Control Protocol (TCP) — one of the core protocols powering the internet, that operates at t…