很适合晚上一个人躲在被窝里

So let's explain the rules of iptables in a common way. There was an analogy before, Each "chain" is a "checkpoint", Every message passing through this "level" must match the rules on this level. If there is a match, The message is processed correspondingly, For example, you and I are like two "messages" at the moment. Both of you and I are going to enter the customs at this moment. But the duke has a life, Only the imposing person can enter the customs, Those who do not meet this requirement are not allowed to enter the customs. So the soldiers guarding the customs followed the "rules" formulated by the duke. I began to look at you and me. In the end, you entered the customs smoothly, and I was rejected. Because you met the standard of "dignity", you were "released", while I did not meet the standard, so I was not released. In fact, "dignity" is a kind of "matching condition", "release" is a kind of "action", and "matching condition" and "action" form the rules.于是正发呆的白凡就发现英王陡然出现在眼前。这本笔记如果拿去古代，的确珍贵万分，但是放在现代社会，纪念意义远远大于实际用途。讲述Nick为过世的岳父整理档案，为了加快进度，他老婆和大姨子帮他请了一个女助手Naomi。Naomi是一个灵气而乖巧的女生，同时也是一个漂泊属性的女生，对于因为工作而共处一室的Nick，大概也只是以同情以及不理解心态，看待NIck苦闷枯燥的工作室生活。The first handshake: when establishing the connection, the client sends syn packet (syn=j) to the server and enters the SYN_SEND state, waiting for the server to confirm;这倒是也不错的主意，只怕是执行起来不容易。你看。