Spring Boot网站在本地工作，但无法远程访问

Question

I was learning to program a website using spring boot and was trying to deploy a working version of my project to my cloud server. I used mvn clean install to build it in to a .jar file locally, then I uploaded it to my cloud server via sftp and ran it with java -jar mywebapp.jar .

Next I entered [my-server-ip]:8080 in my browser and got an empty response error. So I ssh on to my server and ran w3m http://localhost:8080 , and w3m loaded the page successfully, which means the website is running correctly.

I checked netstat -np and I got this:

tcp6       0      0 :::8080                 :::*                    LISTEN      7297/java        off (0.00/0/0)

The cloud server is running Ubuntu 16.04

Any idea what's happening here?

Answer 1

事实证明，这是防火墙设置的一个问题，该设置阻止了除通过端口22的ssh外的所有入站流量。我添加了一条规则，允许端口8080上的传入http流量正常运行，现在它可以正常工作。