查看firewalld是否开启

# systemctl is-enabled firewalld

enabled

停止firewalld

# systemctl stop firewalld

确认firewalld是否停止

# systemctl status firewalld

　firewalld.service - firewalld - dynamic firewall daemon    Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)    Active: inactive (dead)

Jun 22 16:34:23 zabbix.cc systemd[1]: Stopped firewalld - dynamic ....

Hint: Some lines were elliized, use -l to show in full.

关闭firewalld的开机自动启动

# systemctl disable firewalld

Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service. Removed symlink /etc/systemd/system/basic.target.wants/firewalld.service.

确认firewalld开机自动启动以关闭

# systemctl is-enabled firewalld

disabled

 

那么停用了默认的防火墙，而用回之前的iptables，怎么设置呢？

如下：

CentOS 7.0默认使用的是firewall作为防火墙，这里改为iptables防火墙步骤。

1、关闭firewall：

systemctl stop firewalld.service #停止firewall systemctl disable firewalld.service #禁止firewall开机启动 firewall-cmd --state #查看默认防火墙状态（关闭后显示notrunning，开启后显示running）

2、iptables防火墙（这里iptables已经安装，可看另一篇博客，下面进行配置）

vi/etc/sysconfig/iptables #编辑防火墙配置文件 # sampleconfiguration for iptables service # you can edit thismanually or use system-config-firewall # please do not askus to add additional ports/services to this default configuration *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT[0:0] :OUTPUT ACCEPT[0:0] -A INPUT -m state--state RELATED,ESTABLISHED -j ACCEPT -A INPUT -p icmp -jACCEPT -A INPUT -i lo -jACCEPT -A INPUT -p tcp -mstate --state NEW -m tcp --dport 22 -j ACCEPT -A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -jACCEPT -A INPUT -p tcp -m state --state NEW -m tcp --dport 8080-j ACCEPT -A INPUT -j REJECT--reject-with icmp-host-prohibited -A FORWARD -jREJECT --reject-with icmp-host-prohibited COMMIT :wq! #保存退出

备注：这里使用80和8080端口为例。***部分一般添加到“-A INPUT -p tcp -m state --state NEW -m tcp--dport 22 -j ACCEPT”行的上面或者下面，切记不要添加到最后一行，否则防火墙重启后不生效。

systemctlrestart iptables.service #最后重启防火墙使配置生效 systemctlenable iptables.service #设置防火墙开机启动