CentOS7 Firewall防火墙常用命令_firewall-cmd --zone=public --add-masquerade --perm

开启防火墙

systemctl start firewalld.service
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关闭防火墙

systemctl stop firewalld.service
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查看防火墙状态

systemctl status firewalld.service
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开启开机启动防火墙

systemctl enable firewalld.service
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关闭开机启动防火墙

systemctl disable firewalld.service
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开启某个端口（80）

firewall-cmd --zone=public --add-port=80/tcp --permanent   //永久
firewall-cmd --zone=public --add-port=80/tcp               //临时
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端口转发

firewall-cmd --zone=public --add-masquerade --permanent    //打开IP地址伪装
//将8080转发到80
firewall-cmd --zone=public --add-forward-port=port=80:proto=tcp:toport=8080 --permanent
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创建黑名单

//创建blacklist ipset
firewall-cmd --permanent --zone=public --new-ipset=blacklist --type=hash:ip
//封禁 blacklist
firewall-cmd --permanent --zone=public --add-rich-rule='rule source ipset=blacklist drop'
//查看 blacklist
firewall-cmd --ipset=blacklist --get-entries
//添加IP到黑名单
firewall-cmd --permanent --zone=public --ipset=blacklist --add-entry=212.237.51.36
firewall-cmd --permanent --zone=public --ipset=blacklist --add-entry=188.226.191.66
firewall-cmd --permanent --zone=public --ipset=blacklist --add-entry=80.211.137.182
firewall-cmd --permanent --zone=public --ipset=blacklist --add-entry=60.191.66.226
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禁止被PING（丢弃ICMP包）

firewall-cmd --permanent --zone=public --add-rich-rule='rule protocol value=icmp drop'  
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重载防火墙配置

firewall-cmd --reload
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参考文章

云服务器 ECS CentOS 7配置默认防火墙 Firewall
https://help.aliyun.com/knowledge_detail/41317.html
RHEL7、CentOS7 下使用 Firewall 封IP
https://www.itlnmp.com/401.html
firewalld禁止被PING(丢弃ICMP包)
http://blog.csdn.net/Sidyhe/article/details/54836165?locationNum=10&fps=1