虚拟机CentOS防火墙设置

CentOS6关闭防火墙使用以下命令，开启防火墙

systemctl start firewalld

//临时关闭
# service iptables stop
//禁止开机启动
# chkconfig iptables offCentOS7中若使用同样的命令会报错，# stop iptables.service
Failed to stop iptables.service: Unit iptables.service not loaded.这是因为CentOS7版本后防火墙默认使用firewalld，因此在CentOS7中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.当然，如果安装了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
鈼iptables.service - IPv4 firewall with iptables
Loaded: loaded (/usr/lib/systemd/system/iptables.service; disabled; vendor preset: disabled)
Active: inactive (dead)