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Now, let's imagine why these "checkpoints" are called "chains" in iptables. As we know, The purpose of a firewall is to match "rules" for passing messages, Then execute the corresponding Action, So, when the message passes through these checkpoints, You must match the rules on this level, However, there may be more than one rule on this level, But there are many rules, When we put these rules in a chain, A "chain" has been formed. Therefore, we imagine each "checkpoint" as shown in the following figure. In this way, it is more appropriate to call them "chain". Each message passing through this "checkpoint" must match all the rules on this "chain". If there are qualified rules, the corresponding actions of the rules will be executed.It is divided into two groups AB. Group A has three signatures A1, A2 and A3. If A3 is drawn, it will be empty and will advance directly to the next match. If A1A2 is drawn for the match, the winner will compete with A3 for a total of 2 matches, and the first and second place in Group A will be obtained.2. Ignoring defense does too much harm.古谚云“生于苏杭，葬于北邙”。北邙即邙山，是洛阳北侧一片100多公里的丘陵地带。它是洛阳的天然屏障，也是军事上的战略要地。千百年来，从汉魏至隋唐，经五代到宋元。无数帝王将相，富商巨贾，文人雅士，寻常百姓都葬于洛阳邙山。本片以考古发掘为线索，以文化探究为方向，探寻中国的墓葬文化，神秘的龙脉文化，河洛文化，从生死归葬这一角度看帝国的繁华兴衰，政经变迁，探寻中国大一统的内在联系。他们是武将，虽不直属兵部管辖，然此时又不宜去打扰皇帝，只好跟兵部尚书说一声了。Flying Eagle Hunter: Team mate Bow and Arrow [Skill Damage] +15%.然后是赵家的。