edge — notes Occasional write-ups on networking, Linux and the web. https://edge.mainx.ru/ 2026-05-02T09:00:00Z edge Hardening a single-VPS setup without overthinking it https://edge.mainx.ru/notes/hardening-single-vps 2026-05-02T09:00:00Z A pragmatic checklist for locking down one small server: SSH keys, a tight firewall, automatic TLS and just enough monitoring to sleep at night. Why I moved my side projects behind a reverse proxy https://edge.mainx.ru/notes/reverse-proxy-side-projects 2026-03-18T09:00:00Z One entry point, clean TLS termination and a much calmer mental model for everything I host. Notes on automating TLS with ACME DNS-01 https://edge.mainx.ru/notes/acme-dns-01 2026-01-27T09:00:00Z DNS-01 challenges let me issue certificates for services that never need to be exposed directly. Here's the setup I settled on.