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那么齐国也该开始做准备了……………………………………………………………………当局面完全失控的时候，吕雉和曹参才真的慌了神，他们才清楚地意识到，情况远比想象的糟糕。If the message has been matched by the previous rule, iptables performs the corresponding action on the message, Even the latter rules match the current message, It is very likely that there will be no chance to perform corresponding actions on the message again. Take the above figure as an example, the message is first matched by the first rule, so the current message is "released", because the message has already been released, so even if the second rule in the above figure can match the message just "released", there is no chance to discard the message just now. This is how iptables works.This shows the value of these models.正午时分咱们在前面会合。田遥，骨子里骄傲非常的田遥，也未必会听她的。四名最搞笑、最爱讲荤素笑料的哥伦比亚喜剧演员为隔离后渴望听他们讲故事的观众奉上精彩的表演。In a tcp connection, Rst means reset, which is used to close the connection in case of abnormality. When the sending end sends rst message to close the connection again, it does not need to wait for all the datagrams in the buffer to be sent out, but will directly discard the data in the buffer and send rst message. Similarly, after receiving the rst message, the receiving end will empty the buffer and close the connection, and does not need to send ack message for confirmation.