Linux 防火墙只允许指定IP 端口访问

查看防火状态
systemctl status firewalld
2:暂时关闭防火墙
systemctl stop firewalld
3:永久关闭防火墙
systemctl disable firewalld
systemctl stop firewalld.service
4:重启防火墙
systemctl enable firewalld
5、查看防火墙已开通的端口：
sudo firewall-cmd --list-ports

6、开放指定端口：
firewall-cmd --zone=public --add-port=80/tcp --permanent
命令含义：–zone #作用域；–add-port=3306/tcp #添加端口，格式为：端口/通讯协议；–permanent #永久生效，没有此参数重启后失效

7、从Linux防火墙中删除已开放的端口：
firewall-cmd --zone=public --remove-port=6379/tcp

// 允许ip127.0.0.1访问8888端口
firewall-cmd --permanent --add-rich-rule="rule family="ipv4" source address="127.0.0.1" port protocol="tcp" port="8888" accept"
//重新载入一下防火墙设置，使设置生效
firewall-cmd --reload
//查看已设置规则
firewall-cmd --zone=public --list-rich-rules

//限制IP为127.0.0.1的地址禁止访问8888端口即禁止访问机器
firewall-cmd --permanent --add-rich-rule="rule family="ipv4" source address="127.0.0.1" port protocol="tcp" port="8888" reject"
 
//删除已设置规则
firewall-cmd --permanent --remove-rich-rule="rule family="ipv4" source address=" 127.0.0.1" port protocol="tcp" port="8888" accept"