3vo — notes Occasional notes on systems, networking, and quiet engineering. 2026-03-14T10:00:00Z https://de.3vo.ru/ 3vo A small note on IPv6 ULAs and the good life https://de.3vo.ru/notes/ula-and-the-good-life.html 2026-03-14T10:00:00Z RFC 4193 gives you a forty-bit random prefix nobody else will ever use. Some notes on what that means in practice. On boring tools https://de.3vo.ru/notes/boring-tools.html 2026-01-02T09:00:00Z The most reliable tools on my laptop are also the least exciting. Reading old Cisco manuals on a rainy afternoon https://de.3vo.ru/notes/reading-cisco-manuals.html 2025-09-22T14:00:00Z A small defence of reading manuals end to end. DNS queries that go nowhere https://de.3vo.ru/notes/dns-queries-nowhere.html 2025-04-11T20:00:00Z A weekend experiment: log every outbound DNS query from one idle device. About three hundred per hour.