Vienna · systems & networks

I keep servers quiet and packets moving.

Hi, I'm Ivan. I work on Linux infrastructure: networking, monitoring, and the unglamorous plumbing that lets other people ship. This is where I keep notes and small projects.

Projects

edge-metrics

A tiny exporter that turns nftables counters into Prometheus metrics. One binary, no dependencies.

bootstrap

Ansible roles I reuse for every fresh Ubuntu box: users, SSH hardening, time sync, unattended upgrades.

Ansible

latency-map

Measures RTT from a handful of European VPS locations and plots it over a week. Mostly to settle arguments.

Python

Recent notes

Switching a fleet to BBR: what actually changedSep 2026
nginx with TLS 1.3 only — who breaks?Aug 2026
Taming journald disk usageJun 2026

About

Based in Vienna. Previously ran infrastructure for a couple of small product teams. Happy to talk about networking problems, interesting outages, or good coffee.

Email: ivan@shiryaeff.ru