firewall-cmd --query-port=/tcp
注意：开放端口后要重启防火墙生效
firewall-cmd --zone=public --add-port=3306/tcp --permanent
systemctl restart firewalld
firewall-cmd --remove-port=3306/tcp --permanent
systemctl status firewalld
systemctl stop firewalld
systemctl start firewalld
firewall-cmd --zone=public --add-port=40000-45000/tcp --permanent
firewall-cmd --zone=public --list-ports
netstat -lntp
netstat -lnp|grep 3306
以上就是Centos8 防火墙的详细内容，更多关于Centos8 防火墙的资料请关注九品源码其它相关文章！