UFW
UFW (Uncomplicated Firewall) is a command-line firewall manager for Linux that provides a simpler interface for defining host firewall rules. It translates human-readable rules (allow/deny/reject/limit) into kernel-enforced Netfilter rules via the iptables interface (often backed by nftables through the iptables-nft compatibility layer on modern distributions).
UFW
UFW (Uncomplicated Firewall) is a user-friendly firewall management tool for Linux, most commonly used on Ubuntu and Debian-based systems. It provides a simplified command-line interface for managing packet filtering rules that are ultimately enforced by the Linux kernel through Netfilter (via iptables, and on some systems nftables).
IPTABLES
iptables is a user-space command-line tool used to configure Linux kernel packet filtering through the Netfilter framework. It controls how inbound, outbound, and forwarded traffic is handled by defining rules that match packets and apply actions such as accept, drop, reject, log, or jump to another chain.
NFTABLES
nftables is the modern Linux firewall framework that replaces legacy iptables in many distributions. It provides a unified and more efficient ruleset engine inside the kernel, along with a powerful user-space tool (nft) to define firewall policies, NAT, packet mangling, and filtering.
UFW Firewall - Gemini
Objective
Configuring rules UFW , Iptables
Prerequisites