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
