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In the example above, the-R option means modifying the specified chain, Using-R INPUT 1 means modifying rule 1 of the INPUT chain, Using-j REJECT means that the action of changing the first rule in the INPUT chain to REJECT. Note: In the above example, the-s option and the corresponding source address cannot be omitted. Even if we have already specified the number corresponding to the rule, when modifying a rule with the-R option, we must specify the original matching condition corresponding to the rule (if there are multiple matching conditions, we need to specify them).中村光「聖☆おにいさん」の実写ドラマ化が決定した。これは本日11月22日発売のモーニング・ツー2017年1号（講談社）にて発表されたもの。続報は連載100話目を迎える次号にて明かされる。「聖☆おにいさん」は、東京・立川でアパートをシェアし、下界でバカンスを過ごすブッダとイエスのコンビを描いたコメディ。モーニング・ツーにて2007年より連載中で、2013年にはアニメ映画化を果たした。说玄武王发现高凡踪迹，已经追到飞虎关前的铜岭山中去了。该剧的第一季将聚焦于三位第一夫人米歇尔奥巴马、贝蒂福特和安娜埃莉诺罗斯福的个人与政治生活，她们对美国领导层的重塑具有启示性的作用，此前维奥拉戴维斯曾被宣布将扮演前第一夫人米歇尔奥巴马。当这位新生的医生来到维多利亚时代的伦敦时，他发现泰晤士河中有一只恐龙猖獗，并有大量致命的自燃。尹旭默默地坐在原地，倾听者一代名将韩信讲诉自己的心路历程。When a client accesses a server's web service, The client sends a message to the network card, The tcp/ip stack is part of the kernel, Therefore, the client information is transferred to the web service in user space through the kernel's TCP protocol, At this time, the destination destination of the client message is on the socket (IP: Port) that the web service is listening for. When a web service needs to respond to a client request, The destination destination of the response message sent by the web service is the client, At this time, The IP and port that the web service listens on becomes the origin instead, As we said, Netfilter is the real firewall, It is part of the kernel, Therefore, if we want the firewall to achieve the goal of "fire prevention", You need to set up checkpoints in the kernel. All incoming and outgoing messages have to pass through these checkpoints. After checking, those that meet the release conditions can be released, while those that meet the blocking conditions need to be blocked. As a result, input checkpoints and output checkpoints appear. These checkpoints are not called "checkpoints" but "chains" in iptables.