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We know that IPTables acts according to rules. Let's talk about rules. Rules are actually predefined conditions for network administrators. Rules are generally defined as "if the packet header meets such conditions, this packet will be processed in this way". The rules are stored in the packet filtering table in kernel space, specifying the source address, destination address, transport protocol (such as TCP, UDP, ICMP), service type (such as HTTP, FTP, and SMTP), and so on. When packets match the rule, iptables processes these packets according to the methods defined by the rule, such as accept, reject and drop. The main task of configuring a firewall is to add, modify, and delete these rules.慾望無止境，貪念網不住。少女陳慧（郭奕芯飾）搬入工廈劏房，意外介入了被虐少女Emma（鮑康兒飾）和她男友的關係中，靈異事件接連發生；綺雯（許雅婷飾）紋上催情改運符咒刺青，希望男友家洛（麥子樂飾）回心轉意，誰知卻誤墮紋身師阿森（張建聲飾）與其老婆Jenny（蔣祖曼飾）的陰謀之中，每日過著人鬼難辨的生活，靈魂更隨時可能被吞噬； 大學生忠仔（陳家樂飾）帶著妹妹小茹（簡淑兒飾）以及一眾朋友到鬼屋直播靈探，竟然意外發現一對腐屍！前女友依莉打算把握時機大造文章，卻惹來鬼影重重，撩鬼攞命……民国初年，北方桐城县，阔别家乡四年的展家长子展云飞在归途中，与萧家大女雨凤结识，从此两人魂牵梦萦，两情缱绻。展家次子展云翔向来与兄不睦，加之其妻天虹少女时期就对云飞充满仰慕且一直将真情掩藏，更使云翔嫉恨云飞。为泄心头之恨，云翔在向萧家索债不成时，竟一把火将萧家的“寄傲山庄”化为灰烬，致使萧父葬身火海，萧家五姐弟流落街头。Kaspersky DDoS Survey Report刘五四在外出当兵三年后，复员回到家乡，面对迷茫的前途，他始终坚持要做一个有用的人。刘五四不甘只做一名窑工，通过考试当上了镇上派出所的户籍警。虽然只是一名合同制的草帽警察，每天周旋于邻里乡间进行调解工作、处理鸡毛蒜皮的小案件，但刘五四始终坚持着自己公平公正的为人处世原则，有些“一根筋”甚至是拧巴。但这样的拧巴一方面给他带来了爱情和友情，另一方面也招致了很多乡亲的不理解、不满，给自家惹了很多麻烦。刘五四在警察这个职业中不断锤炼打磨，他始终抱着“要做一个有用的人”的梦想。在经历了一系列的风风雨雨之后、也在派出所钟所长的悉心指导下，逐渐成长为了一名优秀成熟的人民警察。Exclude mode. It is similar to Difference, but produces lower contrast. Similarly, mixing with pure white gives the opposite phase effect, while mixing with pure black has no change.