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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:?11. Os.getcwd ()--Get current work dir本片讲述了民族英雄马本斋的传奇人生，再现了英勇无敌的回民支队屡建奇功、战无不胜的神勇与无谓。Elevation symbols are up, down, text on the left and text on the right. A dynamic "block" created below solves these four forms.黄豆见准备停当，就起身把苞谷递给南瓜。摩拉里斯家族的表亲们对他们的文化、社区和家庭都珍而重之，现实却逼迫他们在其中做出取捨。他们该何去何从？冰（李嘉欣 饰）是一个上海著名企业家的女儿，为了寻找与自己的失散了十几年的亲生母亲，不惜瞒着父亲来到香港，并认识了“黑马王子”华弟（刘德华 饰），华弟好心收留了她，并与母亲一起帮她寻找生母。不料冰被人绑架，华弟协助警方救出了冰。冰受伤后，华弟更把自己的一部分肝脏捐给了冰。冰与父亲一起回到了上海，可是正在修养期间的她发现自己已经爱上了华弟。就在她生日那天，父亲说要介绍她认识一位“白马王子”……