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The principle is that syn messages are first responded to syn_ack by DDOS protection system. With a specific sequence number (recorded as a cookie). The real client returns an ack and the Acknowledge number is cookie+1. The fake client will not respond. In this way, we can know that the clients corresponding to those IP are real and add the real client IP to the white list. The next access passes directly, while other forged syn messages are intercepted. The following is a schematic diagram of protection:?一场大吵之后，父子情深，合谋彼此作戏，用一套房子成全两份爱情，上演一出啼笑皆非的爱情保卫战。可欺骗注定还不来爱情，最终，父子俩都绝望了。但坦诚又让他们重新有了爱情的希望.　　韩平是外省女孩。她有时尚女孩的一切特质：美丽，聪明，百折不挠的精神。韩平、叶红和文安是大学同窗，同时也是无话不谈的闺中挚友。要毕业了，韩平品学兼优，被一家报社录用。叶红却因为有权力的母亲擅自调走她的档案跟家里闹得不可开交。文安自恃美貌天资，找到了一个有钱的老板周权。张良点头道：是的，对付我们汉国。Pink: safflower, Rubia cordifoliaThrottle