ssh connection when you don't know the target IP using brute force

ssh_brute_force.py

from concurrent import futures
import paramiko

ssh = paramiko.SSHClient()


def attempt_ssh_connection(ip, timeout=5):
    print('Attemp connection on {}'.format(ip))
    try:
        ssh.connect(ip, username='pi', password='raspberry', timeout=timeout)
        return ip
    except:
        return None

def brute_force(ips, max_workers=20, block_size=500, timeout=5):
    total_ips = len(ips)
    ips_blocks = [ips[block_start:block_start + block_size]
                  for block_start in range(0, total_ips, block_size)]

    for block in ips_blocks:
        with futures.ThreadPoolExecutor(max_workers=max_workers) as executor:
            to_do_map = {}
            print('ready')
            for ip in block:
                future = executor.submit(attempt_ssh_connection, ip)
                to_do_map[future] = ip
            print('steady')
            done_iter = futures.as_completed(to_do_map)
            print('go')
            for future in done_iter:
                try:
                    ip = future.result()
                except:
                    import traceback
                    print(traceback.print_exc())
                    continue
                if ip:
                    print('ACHOU: {}'.format(ip))
                    exit(1)


if __name__ == '__main__':
    ips = ['10.125.{}.{}'.format(i, j) for i in range(1, 255) for j in range(1, 255)]
    brute_force(ips)