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　　马克思自大学毕业后，凭着犀利文笔与非凡思路迅速跃升《莱茵报》总编。然而因撰文抨击普鲁士王国被迫停刊，随后带妻子迁居巴黎。创办《德法年鉴》期间，马克思结识了家境富裕的恩格斯。恩格斯在英国曼彻斯特经营纺织工厂，拥有卓越手腕与经济知识。他的出现，于金钱、于学识，都大大支持了马克思的思想实践。尔后，两人受托起草「正义者同盟」规章，一同完成了经典政治文献《共产党宣言》。一位困苦拮据仍不改其志，一位含着金汤匙又满怀抱负。时代青年的聚首，即将让全世界风云变色！明万历年间，朝廷内忧外患不断，古龙镇上一家名为飞刀门的武馆也由于战乱而日渐萧条，师父老李飞刀和两个关门弟子--万里风和牛大春，一起过着不问世事的平静日子。好景不长，老李飞刀的结拜兄弟，起义军领袖郭靖明将女儿郭盈盈托付给老李飞刀照顾，与此同时老李飞刀青梅竹马的师妹，已被皇帝选为贵妃的牛婉君，也由于后宫斗争，带女儿芊芊和太监小顺子到飞刀门避难。这些人同在一个屋檐下却有着相反的立场，老李飞刀一边努力化解双方的隔阂，一边又要保护师妹不受皇后爪牙的袭击，牛贵妃在亲历了老李飞刀为自己所做的一切之后，与昔日的师兄再续前缘。二十年一度的华山论剑，郭靖明与朝廷的夏将军双双前来，意欲借华山论剑之机拉拢武林中人为自己效力，中途却传来倭寇入侵的消息，起义军与朝廷官兵尽弃前嫌，共御外敌，老李飞刀以盟主的身份组织武林人士协助官军，朝廷表彰其功绩，飞刀门被御封“武林第一门”。在一座怪异森林旁的比利时小镇中，一名警官和新上任的检察官一起调查一名吊在树上的女子之死。板栗见山芋也要插嘴，忙喝道：别吵了。Is it TCP to try to send enough SYN packets and run out of backlog? The purpose of SYN flooding. The attacker added the source IP address to the SYN packet, which would not cause the host to remove the assigned TCB from the SYN-RECEVIED state queue (because the host would respond to the SYN-ACK). Because TCP is reliable, the destination host will wait quite a long time before disconnecting the half-open connection and removing the TCB from the SYN-RECIEVED queue. During this period, the server will not be able to respond to legitimate new TCP connection requests from other applications. Figure 2 shows a simple TCP? The process of a SYN flooding attack.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.