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Well, we've reviewed the concept of rules, And it has been understood that, A rule consists roughly of two logical units, Match conditions and actions, It is useless to say so much, Let's define a rule by hand. Here, we still take the INPUT chain in the filter table as an example, because the filter table is responsible for the "filtering" function, and if all messages sent to the local machine need to be filtered, they will first pass through the INPUT chain (PREROUTING chain has no filtering function), which is very similar to the "entry" scenario we refer to. Therefore, using the INPUT chain in the filter table as an example is helpful for us to understand.Mainland male actors, such as "Brothers Sleeping on My Upper Bed", "Forensic Qin Ming", "River God" and "Trees in the South", speak for Oppo R11s.范亚父的死讯要是传出去，无疑会影响楚军士兵的士气和信心。In order to deepen everyone's understanding, I will introduce in detail the most famous implementation of DoS attacks:. Before introducing in detail, I'd like to talk to you about what a three-time handshake is. The so-called three-way handshake means that when establishing a TCP connection, the client and the server need to communicate several times to confirm their information. It is one of the important means to ensure the reliability of TCP protocol. Let's take a look at its specific process:李敬文也被他二叔拉了出去，村民们都被圣旨两个字吓呆了，再也不敢吭声。Iterator mode: