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/
原文：http://www.cnblogs.com/diyunpeng/p/5095881.html