How I Secure a Linux Server (Step-by-Step Hardening Guide) – What I Actually Do on Every Server
DevOps · 2026-02-28 · 55 min · Barthez Kenwou
A Linux server exposed to the internet without proper hardening is an easy target for bots and attacks in 2026. Weak SSH, open ports, no firewall, manual updates… Here's exactly the defense-in-depth architecture I apply on all my servers (Ubuntu/Debian, AWS EC2, VPS): ultra-secure SSH, UFW + iptables + CSF firewalling, CrowdSec collaborative detection, Naxsi application WAF, Cloudflare edge protection, kernel hardening, monitoring, and automation. Living guide with field stories, concrete commands, a real case where we blocked 99% of automated attacks, and genuine discernment on what your context actually needs.
Tags : LinuxHardening, ServerSecurity, SSHSecurity, Fail2Ban, CrowdSec, DevOps, LinuxSecurity, AppArmor, UFW
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