UFW stands for Uncomplicated FireWall, and is a program for managing a netfilter firewall. It provides a command line interface and aims to be uncomplicated and easy to use. UFW is far simpler than iptables and a good place to start unless you have very specialized needs.
UFW表示简单的防火墙，作为一个对netfilter防火墙的的包装。它提供了一个命令行界面，旨在简单易用。UFW远比iptables更加简单；除非你有特殊需求，使用UFW是最佳选择。