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If an attacker sends SYN packets quickly with their own undisguised IP address, this is a so-called direct attack. This attack is very easy to implement because it does not involve spoofing or modifying packets below the user layer of the attacker's operating system. For example, he can simply send many TCP connection requests to implement this attack. However, for this attack to work, the attacker must also prevent his system from responding to SYN-ACK packets because of any ACK, RST, or ICMP (Internet? Control? Message? Protocol) will cause the server to skip the SYN-RECEIVED state (go to the next state) and remove the TCB (because the connection has been successfully established or recycled). Attackers can do this by setting firewall rules, causing the firewall to block all packets (except SYN) to reach the server, or causing the firewall to block all incoming packets so that SYN-ACK packets are discarded before reaching the local TCP handler.Private String username = "root";　　本片根据古龙的武侠小说《陆小凤传奇》改编而成，但并非原著系列故事之一。《铁鞋传奇》根据原著的人物性格和故事情节，既忠于古龙先生的原著，又在此基础上加以艺术化的整理和演绎，环环紧扣，高潮迭起，把古龙笔下最快意恩仇的《陆小凤传奇之铁鞋传奇》呈现于荧屏。Reporter: How did you feel when you first met Tashi?　　岩城惨遭灭口，现场被伪装成自杀的样子。清弘的同党绑架了我妻智障的妹妹让她染上毒瘾，并将其轮奸。我妻辞去警职，为了给岩城报仇杀死了仁藤和清弘，当他发觉妹妹的惨状时，对最爱的人也抠动了扳机。这时，仁藤的部下暗暗来到他的背后开枪打死了我妻，而菊地则成了接替岩城的人，秘密贩毒依然在继续……Or search public accounts　　飘零的雪花迎来了每年一度的情人节。