Quick and dirty node script for seaching private ips.

netPing.js

const exec = require('child_process').exec;
const options = {
    net: '192.168.0',
    start: 1,
    end: 256,
    verpose: false
};

process.argv.slice(2).forEach( (val, index, array) => {
    
    const i = index + 3;

    switch(val) {
        case '--start':
            options.start = process.argv[i];
            break;
        case '--end':
            options.end = process.argv[i] + 1;
            break;
        case '--net':
            options.net = process.argv[i];
            break;
        case '--verbose':
            options.verbose = true;
            break;
        case '--help':
            console.log('[command] [--flag] [flag-value].... eg: [command] --net 192.168.0');
            console.log('--net');
            console.log('--start');
            console.log('--end');
    }

});

console.info('Pinging ' + options.net + '.' + options.start + ' - ' + options.net + '.' + (options.end-1));

for (let i=options.start; i < options.end; i++) {
    
    let ip = options.net + '.' + i;
    
    if ( options.verbose ) {
        console.info('ping -n 3 -4 ' + ip);
    }
    
    exec('ping -n 3 -4 ' + ip, (err, stdout) => {
        if ( err ) {
            if ( options.verbose ) {
                console.error(err);
            }
            return;
        }

        if (/Reply/g.test(stdout)) {

            const pattern = /\d{1,3}\.\d{1,3}.\d{1,3}.\d{1,3}/g
            const result = stdout.match(pattern);
            console.log('Awnser on: ',result[0]);
        }
    });
}