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immutable 1

rootless, immutable, and open: rethinking the modern tech stack Jul 20, 2025

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systemd service hardening: sandboxing what you already run
fail2ban: automating the lockouts iptables doesn't
iptables: building rules that actually make sense
hardening SSH: the low-hanging fruit most people skip
passive OSINT: mapping an attack surface before you touch anything

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