I have an App that made using Spring Boot 2. I use Undertow as my embedded web server.
My VPS OS is Ubuntu 14.04 lts, and Java 8 has already installed off course along side with Maven.
After my App.jar has successfully generated by mvn clean install
then i move fat jar to my VPS.
when i run java -jar App.jar
it perfectly works.
but when i access using IP there is nothing to show from browser.
This issue has been solved already, it was just missing some configuration on server side :)