es7.17.8 centos7下安装，内网可访问，不能外网访问

如题，求解
elasticsearch.yml内容如下
cluster.name: elasticsearch

node.name: node-1

#network.host: 0.0.0.0

network.bind_host: 0.0.0.0

network.publish_host: 公网ip

http.port: 9200

cluster.initial_master_nodes: ["node-1"]