Node.JS Not working on the internet

Question

i have the basic webserver hello world app for nodejs on windows and it works on localhost. But when i test it from the internet it cannot connect. I set up port forwarding in my netgear router. Am i missing a step here to make my nodejs server visible to the outside world?

Thanks.

var http = require('http');
http.createServer(function (req, res) {
  res.writeHead(200, {'Content-Type': 'text/plain'});
  res.end('Hello World\n');
}).listen(1337, "127.0.0.1");
console.log('Server running at http://127.0.0.1:1337/');

It would help if you show us the code you are using. – AppleGrew Aug 26 '11 at 17:14 — AppleGrew, Aug 26 '11 at 17:14
It's just the hello world web server on nodejs website. – BRampersad Aug 26 '11 at 17:34 — BRampersad, Aug 26 '11 at 17:34

score 18 · Accepted Answer · edited Dec 22 '13 at 21:25

18

Make sure you listen on 0.0.0.0 instead of 127.0.0.1

127.0.0.1 is a private network visible only to your computer. 0.0.0.0listens to all interfaces, including both the private and public (as public as it can be behind a NAT).

edited Dec 22 '13 at 21:25

HamZa

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answered Aug 26 '11 at 17:34

Bryan Boettcher

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Cool, where did you learn that? Didn't even know 0.0.0.0 was a valid ip. – BRampersad Aug 26 '11 at 17:49
Picked it up somewhere in Linuxland, probably editing lighttpd configs by hand or something. It's been awhile. – Bryan Boettcher Aug 26 '11 at 17:54
I have the same problem, I did use 0.0.0.0 but still can't access my server outside. – quarks Nov 05 '11 at 05:51
@xybrek: create a new question, it's probably a router configuration issue though. – Bryan Boettcher Nov 07 '11 at 16:17
@insta I just created a new nodejs server using Ubuntu which fixed everything. And did iptables – quarks Nov 07 '11 at 16:50

score 0 · Answer 2 · answered Aug 14 '21 at 14:21

Just to make sure.

Your code should run like this.

var http = require('http');
const port = 1337;
const host = '0.0.0.0';

http.createServer(function (req, res) {
  res.writeHead(200, {'Content-Type': 'text/plain'});
  res.end('Hello World\n');
}).listen(port, host);
console.log('Server running at http://${host}:${port}');

score 0 · Answer 3 · answered Aug 26 '11 at 17:36

0

Looks like you're binding the server to IP Address 127.0.0.1 which is localhost. If you want to access it elsewhere you'll need to set it to it's internet IP. Check out whatismyip.com and use that IP instead.

answered Aug 26 '11 at 17:36

goatslacker

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This won't work if he's behind a NAT. His internal IP address will (likely) be 192.168.x.x, but his public address will be something entirely different. – Bryan Boettcher Aug 26 '11 at 17:38
what to do if you're behind a NAT? – tu4n Sep 30 '16 at 14:48

Node.JS Not working on the internet

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