A port scan with node.js ( by Hacksparrow <http://www.hacksparrow.com> )

portscan.js

#!/usr/bin/env node
var net = require('net'),
    host = 'localhost',
    start = 1,
    end = 10000,
    timeout = 15000;

while ( start <= end ) {
    var port = start;

    (function ( port ) {
        var s = new net.Socket();    

        s.setTimeout( timeout, function () {
            s.destroy();       
        });

        s.connect( port, host, function () {
            console.log( 'OPEN: ' + port );    
        });

        s.on( 'data', function ( data ) {
            console.log( port + ': ' + data );    
            s.destroy();
        });

        s.on( 'error', function () {
            s.destroy();    
        });
    } ( port ));

    start++;
}