Firewall CentOS 7: Configurar, habilitar, deshabilitar y crear reglas

Linux flush or remove all iptables firewall rules

A Firewall decides what enters or exits your network — blocking attacks, filtering traffic & keeping systems secure 24/7. If you’re learning Cyber Security or preparing for SOC roles, Firewall understanding is a MUST. Firewall Basics (2-Minute Clarity) • Stateless → Fast but no session memory • Stateful → Remembers connections, more secure • Proxy (L7) → Filters web content, hides IP • NGFW → DPI IPS Threat Intel App Control (Most Powerful) Firewall Rule Structure (Remember These 6) 🔹 Source IP