Notes on the network you live on
Short, opinionated writing about how the internet actually works underneath. IPv6, security headers, DNS, certificates, browser fingerprinting — the things our tools touch every day.
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IPv6 in 2026: closer than you think, still not there
Forty-five percent of Google's traffic is now over IPv6 — up from 36% in 2023. Why adoption finally crossed the threshold, which countries are leading, and what's still standing in the way.
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HTTP security headers: which seven you actually need
There are about 40 HTTP headers you could set for security. Seven of them carry 95% of the value. What each one does, how to configure it on Nginx, Apache, or Cloudflare, and the common mistakes that turn a strong header into useless decoration.
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UUID v7 is here. When should you switch from v4?
RFC 9562 standardised UUID v7 in 2024. It's a time-ordered UUID that solves a real performance problem with v4 in databases — but only sometimes. The technical difference, when v7 is worth migrating to, and when v4 is genuinely the right answer.
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DNS over HTTPS, explained — what changed when your name lookups got encrypted
Until 2018 your ISP saw every domain you typed. DoH quietly fixed that. Which resolver to actually use, how to enable it on macOS, Windows, iOS, Android, and what DoH legitimately breaks.
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ASN and BGP, for normal humans
The internet runs on 90,000 networks held together by a 1989 routing protocol. How BGP works, why it occasionally breaks the internet, and what RPKI is finally doing about it.
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What your browser leaks the moment you visit a website
Eighteen data points every website receives about you before you click anything. Severity-ranked: from your IP address (worst) to your hardware concurrency (negligible). And the four defences that actually work.
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Why your speed tests disagree (and which one to trust)
Same connection, three speed tests, three different numbers. What "up to 300 Mbps" actually means in your contract, how to test honestly, and the one number that actually matters.