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海瑞。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.　　然而浪漫的恋爱故事并未向顺利的方向进行，不久后Alex神秘失踪，Danny开始一步步追查，一个个神秘线索把他引向一个让他窒息的可怕事实。他发现自己已经卷入了一个纷繁复杂又危机重重的间谍世界。他能否凭一己之力，与这个强大的对手斗争到底，找出真相？Table 7 Reflection servers ranked TOP20 in the number of SSDP reflection attacks that were used to launch in the country this month.2417First, what is content-based products