The function tcp_output is called, which outputs the SYN packet onto the network.

调用函数tcp _ output，将SY n包输出到网络。

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The outbound SYN packet from each host creates the necessary NAT state for its own NATs.

从各自的主机外出的SYN包，为他们自己的NAT产生可能的NAT状态。

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Attacker sends a TCP SYN packet to the target port from his own IP address (or one he controls) to request a connection.

攻击者从自己的的IP地址(或者他控制的)发送一个TCP SYN攻击或者自己包到目标端口请求连接。

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