瘦了就帅了 Cuile

# 停止firewalld服务
$ systemctl stop firewalld
# 禁用firewalld服务
# $ systemctl mask firewalld
# 删除firewalld
$ yum erase firewalld

# 先检查是否安装了iptables
$ systemctl status iptables
# 安装iptables
$ yum install iptables iptables-services -y

# 注册iptables服务，相当于以前的chkconfig iptables on
$ systemctl enable iptables
# 开启服务
$ systemctl start iptables
# 查看状态
$ systemctl status iptables
# 重启防火墙
$ systemctl restart iptables
# 保存规则
$ service iptables save
# 如果报“-bash: service: command not found”，则需要安装initscripts
$ yum install initscripts -y