I don't see how this is a tutorial to prevent hacking at all..
There is difference between recommending/telling someone to use something that isn't exploitable, then teaching them how to search what they have for exploits and then onto patching them.
Your 'DDoS' part as well is just lacking so much. This is barely a tutorial. There's no in depth explanations, there's no actual tutorial it's just you saying to use this and use this.