#Linux
#Security
#Server
#DevOps
Essential security checklist for Linux servers. From SSH hardening to firewall configuration, protect your infrastructure.
Server Security Fundamentals
A compromised server can devastate your business. Follow this checklist.
Initial Setup
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1. Update System
apt update && apt upgrade -y
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2. Create Non-Root User
adduser admin
usermod -aG sudo admin
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3. SSH Hardening
PermitRootLogin no
PasswordAuthentication no
Port 2222
Firewall Configuration
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UFW Setup
ufw default deny incoming
ufw default allow outgoing
ufw allow 2222/tcp
ufw enable
Intrusion Detection
Install and configure Fail2Ban:
apt install fail2ban
Regular Audits
Schedule monthly security audits and reviews.
