UFW

安装

# pacman -S ufw

自启动

# systemctl enable --now ufw.service
# systemctl disable iptables
# systemctl stop iptables

添加

# ufw default deny incoming
# ufw default allow/deny outgoing
# ufw allow 22/tcp
# ufw enable

删除

# ufw delete allow 22/tcp

查看

# ufw status