centos 7关闭防火墙

2018-10-30 小惟 26

CentOS 7.0默认使用的是firewall作为防火墙


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)


 


将centos设置iptables防火墙


iptables防火墙(这里iptables已经安装,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