Centos7防火墙

Centos7 firewall 命令：

• 查看已经开放的端口

firewall-cmd --list-ports

• 开启端口

firewall-cmd --zone=public --add-port=80/tcp --permanent

• 重启防火墙

firewall-cmd --reload   #重启firewall

• 关闭防火墙

systemctl stop firewalld.service   #停止firewall
systemctl disable firewalld.service   #禁止firewall开机启动

iptables

• 编辑防火墙配置文件

vi /etc/sysconfig/iptables 

# 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

添加端口：-A INPUT -p tcp -m state --state NEW -m tcp--dport 9090 -j ACCEPT

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