CentOS6关闭防火墙使用以下命令：
//临时关闭 service iptables stop //禁止开机启动 chkconfig iptables off
CentOS7关闭防火墙使用以下命令：
//临时关闭 systemctl stop firewalld //禁止开机启动 systemctl disable firewalld Removed symlink /etc/systemd/system/multi-user.target.wants/firewalld.service. Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
若安装了iptables-service，也可以使用下面的命令：
yum install -y iptables-services //关闭防火墙 service iptables stop Redirecting to /bin/systemctl stop iptables.service //检查防火墙状态 service iptables status Redirecting to /bin/systemctl status iptables.service iptables.service - IPv4 firewall with iptables Loaded: loaded (/usr/lib/systemd/system/iptables.service; disabled; vendor preset: disabled) Active: inactive (dead)