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The SYN-Flood attack is currently the most common DDoS attack on the network, It is also the most classic denial of service attack. It takes advantage of a defect in the implementation of TCP protocol. By sending a large number of attack messages with forged source addresses to the ports where the network service is located, it may cause the half-open connection queue in the target server to be full, thus preventing other legitimate users from accessing. This kind of attack was discovered as early as 1996, but it still shows great vitality. Many operating systems, even firewalls and routers, cannot effectively defend against this kind of attack, and it is very difficult to trace it because it can easily forge the source address. Its packet characteristics are usually that the source sends a large number of SYN packets and lacks the last handshake ACK reply of the three handshakes.你干嘛抢我的肉？胡钧气得脸都变色了：她还有一点女人样子吗？连人肉都吃上了。影片故事发生在1948年冬天上海的一幢弄堂房子里。小官僚侯义伯非法霸占了这所房子，把原房主孔有文赶到咫尺之地的后客堂，他自己和姘妇余小瑛住在二楼。政府摇摇欲坠，侯义伯急于把房子顶出去好捞几个钱逃命。这件事引起房客们的恐慌，大家忙想办法对付。但与世无争的孔有文不敢挺身收回房子，华先生也自视清高不肯领头，肖老板自愿出头却碰了钉子。大家只好各自为谋。肖太太把仅有的首饰和盘尼西林针药押给侯义伯．借钱轧黄金，想发财顶房子，结果夫妻二人反被打伤；华先生想搬到学校去，校长用房子收买他，他拒绝了，却被以鼓励学潮的罪名被捕人狱；华太大女儿生病，向侯义伯求援反遭调戏……那六胞胎在完全新作剧场版中回来了！