The Socket.io server running on Express is currently not reachable from any external devices

I currently have a basic application using socket.io and expressjs up and running. The application is hosting a simple HTML file, which I can successfully access through my browser. However, when attempting to access it from other devices on my network, the connection seems to fail.

var express = require('express');
var app = express();
var server = require('http').createServer(app);
var io = require('socket.io').listen(server);
users = [];
connections = [];

server.listen(process.env.PORT || 3000);
console.log('Server running...')

var path = require('path');
app.use(express.static(path.join(__dirname, "")));

I have a feeling that I may be overlooking something important. What steps should I take in order to deploy this site for use on other devices (or even on the internet)?

Answer №1

To make your server accessible, remember to include .listen(3000, "0.0.0.0"); in your code and ensure that the necessary port is open on your firewall.

Alternatively, you can utilize a service like ngrok which provides a secure URL for accessing your localhost server even through firewalls or NAT configurations (local network or global).

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