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The firewall sets the SYN forwarding timeout parameter (the firewall for state detection can be set in the state table), which is much less than the timeout time of the server. When the client sends the SYN packet and the server sends the acknowledgement packet (SYN + ACK), if the firewall has not received the acknowledgement packet (ACK) from the client by the time the counter expires, it sends the RST packet to the server to cause the server to delete the half connection from the queue. It is worth noting that the setting of gateway timeout parameters should not be too small or too large. If the setting of timeout parameters is too small, it will affect normal communication. If the setting is too large, it will also affect the effect of preventing SYN attacks. This parameter must be set according to the network application environment.《变形计》是一档以关爱和反思为视角，关注当代中国青少年教育和成长问题的青春励志生活类角色互换纪实节目。《变形计》第十八季依然采用双边互换的形式展开变形，多维度关注和解析00后少年成长生态。你别跑。冷暖人生,人生如戏,关注发生在普通人身上的命运起落,聆听来自城市边缘的呼吸.神秘的巨型机甲——“天狼号”从天而降，三位地球少年误闯入机甲内，由此结识了操控“天狼号”的天狼星人，并与之一同对抗邪恶的外星势力。难道这老先生指的是承影，断水的神剑传说？。