Quick and dirty test to see which ports are whitelisted in a firewall

outPortTester.js

var request = require('request');

let blocked = [], open = []

lastPort = 6000

function pingPort(port) {
    request('http://portquiz.net:' + port, function (err, res, body) {
        //console.log(err, res, body)
        if ((!err && res.statusCode == 200) || (err && err.code == 'HPE_INVALID_CONSTANT')) {
            console.log('open:', port);
            open.push(port);
        }
        else {
            //console.log('blocked:', port);
            blocked.push(port)
        }
    });
}


for (i = 1; i < lastPort; i++) {
    pingPort(i);
}

function numeric(a, b) {
    return a - b;
}

function exitHandler(options, exitCode) {
    if (options.cleanup) console.log('clean');
    if (exitCode || exitCode === 0) console.log(exitCode);
    if (options.exit) process.exit();

    console.log("\n\n\n==== SCAN DONE! ====");
    console.log('Blocked:');
    console.dir(blocked.sort(numeric), { 'maxArrayLength': null });
    console.log('Open:');
    console.dir(open.sort(numeric), { 'maxArrayLength': null });
}

//do something when app is closing
process.on('exit', exitHandler.bind(null, { cleanup: true }));

//catches ctrl+c event
process.on('SIGINT', exitHandler.bind(null, { exit: true }));

// catches "kill pid" (for example: nodemon restart)
process.on('SIGUSR1', exitHandler.bind(null, { exit: true }));
process.on('SIGUSR2', exitHandler.bind(null, { exit: true }));

//catches uncaught exceptions
process.on('uncaughtException', exitHandler.bind(null, { exit: true }));