Documentation

Concise references written by practitioners. No framework hype, no sponsored content.

Complete reference for HTTP/1.1 and HTTP/2 status codes with real-world usage notes.

http

Step-by-step walkthrough from ClientHello to application data.

tlssecurity

MSS, Window Scale, SACK, Timestamps — what each reveals about the sender.

tcpnetworking

X-Forwarded-For, X-Real-IP, Forwarded — which to set, which to trust.

ops

Why printf-style logging fails at scale, and patterns for correlation IDs.

observability