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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.从郊区的家里被送去汽车修理店工作后，一名年轻男孩的生活有所改变，直到一次契机迫使他做出艰难抉择。Hit rate +5%Smoke bombs before burning:一个男人相信自己是一个花花公子。　　她的勇气来了，她的力量来了，她要她的孩子回来。她卷起袖子，凭着自己的力量开创事业，她要把孩子接回她的身边，像星星般地围绕着她。