https://blog.csdn.net/yanzi1225627/article/details/51470962
添加端口
# firewall-cmd --zone=public --add-port=6022/tcp --permanent
# firewall-cmd --zone=public --add-port=6022/udp --permanent删除一个端口
# firewall-cmd --zone=public --remove-port=6022/tcp --permanent
# firewall-cmd --zone=public --remove-port=6022/udp --permanent