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When the SYN gateway receives the SYN packet from the client, it directly forwards it to the server. After receiving the SYN/ACK packet from the server, the SYN gateway forwards the packet to the client and sends the ACK confirmation packet to the server in the name of the client. At this time, the server enters the connected state from the semi-connected state. When the client confirms the arrival of the packet, it forwards if there is data, otherwise it discards it. In fact, the server has a connection queue in addition to maintaining the semi-connection queue. If SYN attack occurs, the number of connection queues will increase, but the number of connections that the general server can withstand is much larger than the number of semi-connections, so this method can effectively reduce the attack on the server.清单写的很清楚，有些是必要带的，人人都有。Define the interface first:他的师父之一，十大恶人中的不吃人头李大嘴的岳父——三湘武林盟主。"We tied nails and belts to make wooden rafts. The rafts were tied into the water. I was tidying up the liferafts. Chief mate Fu Yizhong got on the rafts. He waved to me while laughing and said, 'Don't make any noise, you come up.' He said several times, but I said I didn't finish it. Wait a minute. At that time, there were three more on the raft besides the first mate. Song Guochun, Gong Xuejun and Ding Yumin all put on life jackets.谁也不没有听到，无声的叹息不断出来……范亚父站在高台上整整一个下午，夕阳西下，晚风阵阵，好在是夏季，颇为凉爽。