SSE Security Pub Sub Architecture — คู่มือฉบับสมบูรณ์ 2026

วิธีป้องกันและ Hardening สำหรับ SSE Security Pub Sub Architecture

Security Hardening — Complete Checklist

# ═══════════════════════════════════════
# Security Hardening Script
# Tested on Ubuntu 24.04 LTS
# ═══════════════════════════════════════

# 1. System Updates
sudo apt update && sudo apt upgrade -y
sudo apt install -y unattended-upgrades
sudo dpkg-reconfigure -plow unattended-upgrades

# 2. Firewall (UFW)
sudo ufw default deny incoming
sudo ufw default allow outgoing
sudo ufw allow 22/tcp comment "SSH"
sudo ufw allow 443/tcp comment "HTTPS"
sudo ufw enable
sudo ufw status verbose

# 3. SSH Hardening
sudo tee /etc/ssh/sshd_config.d/hardening.conf << 'EOF'
PermitRootLogin no
PasswordAuthentication no
PubkeyAuthentication yes
MaxAuthTries 3
ClientAliveInterval 300
ClientAliveCountMax 2
X11Forwarding no
AllowTcpForwarding no
Protocol 2
EOF
sudo systemctl restart sshd

# 4. fail2ban
sudo apt install -y fail2ban
sudo tee /etc/fail2ban/jail.local << 'EOF'
[DEFAULT]
bantime = 3600
findtime = 600
maxretry = 3
action = %(action_mwl)s

[sshd]
enabled = true
port = 22
maxretry = 3
bantime = 86400
EOF
sudo systemctl enable --now fail2ban

# 5. Audit Logging
sudo apt install -y auditd audispd-plugins
sudo systemctl enable --now auditd
sudo auditctl -w /etc/passwd -p wa -k identity
sudo auditctl -w /etc/shadow -p wa -k identity
sudo auditctl -w /etc/sudoers -p wa -k sudo_changes

# 6. Kernel Hardening
sudo tee -a /etc/sysctl.d/99-security.conf << 'EOF'
net.ipv4.conf.all.rp_filter = 1
net.ipv4.conf.default.rp_filter = 1
net.ipv4.icmp_echo_ignore_broadcasts = 1
net.ipv4.conf.all.accept_redirects = 0
net.ipv4.conf.all.send_redirects = 0
net.ipv4.conf.all.accept_source_route = 0
net.ipv4.tcp_syncookies = 1
kernel.randomize_va_space = 2
fs.suid_dumpable = 0
EOF
sudo sysctl -p /etc/sysctl.d/99-security.conf