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Yu Chen: It's incredible.昏暗的霓虹灯下，阴冷潮湿的城市里栖息着两名神秘女子：克拉拉和埃莉诺。她们以姐妹相称，固守着在都市一隅的方寸空间，不愿引起他人的注意。对于血族来说，这也许是最好的办法。只是在 命运的驱赶下，“安宁”注定与她们无缘，两人辗转来到了另一座城市。四处寻找生计的克拉拉偶然结识刚刚失去母亲的中年男子诺埃尔，相似的境遇让他们感同身受。诺埃尔因此为这两名美丽女子提供栖身之所。板栗慌忙道：要不，咱们去找妹妹瞧瞧？到底我们男人，不大懂她们姑娘家心思，妹妹或许能帮着出主意。张老太太尝了一筷子，点头道：好吃。在新泽西州长大的卡玛拉·汗得知她拥有多面性的力量。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.