/etc/network/interfaces (Debian/Ubuntu) atau /etc/sysconfig/network-scripts/ (RHEL/CentOS). Contoh konfigurasi static IP di Debian: auto eth0 iface eth0 inet static address 192.168.1.100 netmask 255.255.255.0 gateway 192.168.1.1 Untuk jaringan dinamis (DHCP), cukup ganti static dengan dhcp. DNS ... fail2ban Auto-blokir IP nakal setelah beberapa percobaan gagal. Contoh jail untuk Nginx (block brute force login): [nginx-botsearch] enabled = true port = http,https filter = nginx-botsearch logpath = /var/log/nginx/access.log maxretry = 3 bantime = 1h 3. Network Scanning dengan nmap Cek port
