TODO: 可能需要移到linux category或其它的目录

• http://www.voidcn.com/blog/yangfanacc/article/p-1454490.html
• http://www.178linux.com/3760
• http://laoyaoyugan.com/dns%E7%9A%84%E6%9D%82%E4%B8%83%E6%9D%82%E5%85%AB/
• http://www.xxorg.com/archives/2291
• https://zh.wikipedia.org/wiki/%E5%9F%9F%E5%90%8D%E7%B3%BB%E7%BB%9F
• https://zh.wikipedia.org/wiki/%E6%A0%B9%E7%B6%B2%E5%9F%9F%E5%90%8D%E7%A8%B1%E4%BC%BA%E6%9C%8D%E5%99%A8
• http://jeffyyko.blog.51cto.com/28563/214131
• http://jeffyyko.blog.51cto.com/28563/216962
• https://ring0.me/2014/02/anti-poisoning-dns/