~/writing
Notes and writeups.
Technical writeups and postmortems from competition and lab work, written first person by Alexander Chmiel. The mistakes stay in.
- May 2026NECCDC 2026: what we got right, what stungA first-person NECCDC 2026 blue team postmortem: two days defending Active Directory against a professional red team, what worked, what failed, and what we would do differently.
- May 2026Running a homelab firewall like productionThe full technical writeup of my firewall management lab: topology, explicit-deny policy, the change-management gate in front of every rule, and a worked incident from alert to closed report.