![WAF WAF](https://image.shishitao.com:8440/aHR0cHM6Ly9ia3FzaW1nLmlrYWZhbi5jb20vdXBsb2FkL2NoYXRncHQtcy5wbmc%2FIQ%3D%3D.png?!?w=700&webp=1)
http://netsecurity.51cto.com/art/201010/231124.htm
http://wenku.baidu.com/link?url=elrFtxPRcwJ5FjlXEuhHetyixIf-p9ovfWZ1ApM7luyb9V7DRzl24l96YnuAoHqBz76wPe_nE2YpbNp1suRwCGZKBZ-OdAeUSCBKNMlryYu
http://bbs.aliyun.com/read/192934.html
http://blog.nsfocus.net/cc-attack-defense/
http://secsky.sinaapp.com/216.html