subdomain3
description：a simple and fast tool for bruting subdomains
author:yanxiu
Python：python3.5+
three patterns for speed：
low：around 350 number/s
medium：around 450 number/s
high：around 700 number/s
usage:
-h, --help show this help message and exit
-s SPEED, --speed SPEED
low,medium and high
-d DOMAIN, --domain DOMAIN
domain name,for example:baidu.com
-l LEVEL, --level LEVEL
example: 1,hello.baidu.com;2,hello.world.baidu.com
example:pyrhon3 brutedns.py -d target -l 1/2 -s low/medium/high
screenshot(the speed of high)：
