[root@k8s-m3 ~]# curl -I 172.16.1.9:30394
HTTP/1.1 200 OK
Server: nginx/1.15.9
Date: Mon, 18 Mar 2019 15:22:10 GMT
Content-Type: text/html
Content-Length: 612
Last-Modified: Tue, 26 Feb 2019 14:13:39 GMT
Connection: keep-alive
ETag: "5c754993-264"
Accept-Ranges: bytes

[root@k8s-m3 ~]# curl -I 172.16.1.240:30394 # timeout
[root@k8s-m3 ~]# grep bind /etc/kubernetes/kube-proxy.conf 
bindAddress: 0.0.0.0

the config's file had bind the 0.0.0.0, but the second ip cannot be accessed.