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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.广告公司女继承人沈傲男在父亲重病之时为可以继续跆拳道梦想，在父亲的嘱托中接手广告公司，却遭遇重大信任危机；在不打不相识的下属云舒的帮助下，查明真相，最终收获事业与爱情的故事。洪霖冷笑对板栗道：你当我想护着那个蠢货？你若是不信，只管往大了闹，横竖这事与我无关，爱怎样闹随你。…,正是那些鲜血给了山阴人最强烈的震撼，周家曾经是何等的风光，何等的不可一世。此关一开，思如泉涌，骚主意都蹦了出来。