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A2. 1.3 Nutritional development.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.Part: The criminal's confession and the process of the crime,　　新感觉超时尚的青春热辣剧，山和海、豪华的度假村等能把仲夏的浪漫一一展现的场所用超生动的手法描写的淋漓尽致，而且通过新鲜的人物性格和现实感很强的故事来传递生命的活力和感动。　　电视剧《太平公主秘史》是由浙江长城影视传媒和湖南卫视联合打造的古代宫廷传奇电视剧，该剧2011年8月开拍。叙述了唐朝两位公主对调身份的传奇故事。贾静雯在剧中分饰太平公主和安定公主，林妙可、郑爽扮演她All belong to Strong Treasure Beads