firewalld配置

1.启动firewalld

systemctl start firewalld.service

2.永久开放80端口

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

3.查看开放的端口

firewall-cmd --list-ports

4.重新加载防火墙生效

firewall-cmd --reload

5.禁止192.168.0.79访问22端口

firewall-cmd --zone=public --add-rich-rule="rule family='ipv4' source address='192.168.0.79' port port=22 protocol=tcp drop" --permanent

firewall-cmd --zone=public --add-rich-rule="rule family='ipv4' source address='36.156.32.13' drop" --permanent

6.取消禁止

firewall-cmd --zone=public --remove-rich-rule="rule family='ipv4' source address='192.168.0.79' port port=22 protocol=tcp drop" --permanent

 参考：https://www.cnblogs.com/vicowong/p/11210144.html