hadoop web interface access

I deploy hadoop on a cloud service, I have one master node with a public IP and a private IP, and two slave nodes. The service runs smoothly when I type in jps

But when I want to use web browser check the status, I can't access to it using public IP.

128.104.223.153:50070

So I tried to ssh to the master cluster, and use w3m, a tool for web access in ssh, I can access to the webpage using private IP maybe because I'm in the subnet.

localhost:50070

So it seems that the public IP is not recognized by the browser, but I can still using public IP to ssh to my server.