JavaScript Hosting Socket.io Server over LAN hosting socket server,websocket server hosting,hosting socket server c#

I'm building Socket.IO's example chat project (with some modifications) and I've been trying to get people to connect with both localhost:3000 and 127.0.0.1:3000, but neither are working. Am I missing something? (If there's a blatantly obvious problem, sorry. I suck with networking.)

index.js:

var app=require('express')();
var http=require('http').Server(app);
var io=require('socket.io')(http);
var chalk=require('chalk');

var online=0;
var prt=process.argv[2]===undefined?3000:process.argv[2];

process.stdin.on('data',function(){
    var str=String(process.stdin.read());
    if(str.search("!quit")){
        io.emit('chat message','Console: stopping server.');
        process.exit();
    }
});

app.get('/',function(req,res){
    res.sendFile(__dirname+'/index.html');
});

io.on('connection',function(socket){
    online++;
    console.log(chalk.green('joined  |',chalk.cyan(online),'online'));

    socket.on('chat message',function(msg){
        io.emit('chat message',msg);
        console.log(chalk.magenta('message |',msg));
    });

    socket.on('disconnect',function(){
        online--;
        console.log(chalk.red('left    |',chalk.cyan(online),'online'));
    });
});

http.listen(prt,function(){
    console.log(chalk.yellow('SIOChat listening on',chalk.cyan(prt)));
});

index.html (omitted css for readability):

<html>
    <head>
        <title>SIOChat</title>
    </head>
    <body>
        <ul id='messages'></ul>
        <form action=''>
            <input id='m' autocomplete='off'/><button>Send</button>
        </form>
        <script src='https://cdn.socket.io/socket.io-1.2.0.js'></script>
        <script src='http://code.jquery.com/jquery-1.11.1.js'></script>
        <script>
            var socket=io();

            var name=prompt('Enter a nickname','Guest');

            $('form').submit(function(){
                socket.emit('chat message',name+': '+$('#m').val());
                $('#m').val('');
                return false;
            });

            socket.on('chat message',function(msg){
                $('#messages').append($('<li>').text(msg));
            });
        </script>
    </body>
</html>

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