Technical notebook

Technical notebook.

Field notes: what was actually done on real servers, what broke, and how it got fixed.

Entries

2
  1. N° 002

    Docker bypasses UFW: why published ports stay open, and the fix

    · 9 min

    Ports published by Docker are reachable from the Internet even when UFW says deny. How it happens, how to test from outside, and a clean fix on Debian 13.

  2. N° 001

    jQuery vs Vanilla JavaScript in 2026: Do You Still Need jQuery?

    · 8 min

    jQuery 4 is still 27 KB gzipped. Why I dropped it, the native APIs that replace it in 2026, a jQuery-to-vanilla cheat sheet, and when keeping it is fine.

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