Node server not responding on VPS?

Question

Node.js

there is a VPS server. installed node.js and ran a file with a simple code to test it:
var http = require("http");
var server = new http.Server();
server.listen(9099, "localhost");
server.on('request', function(req, res){
res.end("hello world!");
});
Launched in the console, everything is fine. But when you try to access it through the domain name and port, as well as through the server ip and port, the error "Timed out waiting for a response from the site" and in the console "net:: ERR_CONNECTION_TIMED_OUT"
What could be the problem?

Answer 1

server.listen(9099, "localhost");
your server listens to localhost, specify 0.0.0.0 or server IP.