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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.《打黑重案组》故事发生在南方市，当地的公安局打黑重案组遭遇到一桩棘手案件。在破案过程中，重案组受到各种各样的阻挠，案件侦破几度中断。但公安局长和乾警们不为困难所阻，不顾自己和家人所遭受的苦痛，坚持调查最终查清案情，一举打掉了南方市的黑恶组织。歉意地对少年笑道：哥哥不要急，等一下就好了。He taught me to be a child again.部队休假的天浩去见他多年未见的妹妹天芯，却看到妹妹死在了自己的眼前。怒不可遏的天浩在妹妹好友琳琳的协助下，寻找杀死妹妹的凶手。随着追踪的不断深入，天浩一路打杀，突破层层障碍，一个跨国人蛇集团露出了水面。在香港，天浩潜进了他们的交易市场，发现了他们诱拐妇女和儿童，以竞相拍卖的形式卖给来自全球各地的富豪，而天芯正是因为不服从而惨遭毁容及杀害。天浩陷入了人蛇集团设下的圈套，喝了使心脏萎缩的药，琳琳亦为保护天浩而死，随着天浩体能渐渐耗尽，爱的人一个个死去，面对如此强悍的组织，天浩如何解决眼前的危机？又如何和恶势力抗争？其中又有什么玄机？