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When the client SYN packet arrives at the filter gateway, the SYN agent does not forward the SYN packet, but actively replies the SYN/ACK packet to the client in the name of the server. If the client's ACK packet is received, it indicates that this is normal access. At this time, the firewall sends the ACK packet to the server and completes three handshakes. The SYN agent actually replaces the server to deal with SYN attacks. At this time, the filter gateway itself is required to have strong ability to prevent SYN attacks.从2013年1月11日起，台秀大玩家将在东南卫视每周五晚21：00和大家见面！这里有台湾的文化、美食、艺人明星、名胜古迹...这里通过头脑竞技会介绍你喜欢的台湾的一切！After saying this passage, Zhao Mingkai's eyes looked at the light in the interview room and fell into a silence. I knew that he was thinking of sad things. He tentatively asked him how Zhou Xiaolin was doing later. He sighed deeply and said with a regretful tone:1. Incident ProfileA. Speed skating[Re-understanding Squat and Full Squat] Strength + Efficiency + Technology小葱听了这话，看着他身上的烙伤，和那狂怒的眼神，浑身虚软，站立不稳。