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可尹旭并不像看到这样的情景，那样的话又不知道有多少家庭妻离子散，甚至是家破人亡。In 1995, GoF (Gang of Four) co-published the book "Design Patterns: Basis of Reusable Object-Oriented Software", which included 23 design patterns. Since then, GoF has set a milestone in the field of software design patterns, known as "GoF Design Patterns".相比于彭城的尔虞我诈，风波诡谲，倒是难得的惬意。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.申道终于明白日本将在2年内毁灭，于是走上了和妖兽战斗的悲惨道路……胡家也不会护胡镇到今日，早死了八百回了。　　阿Pat在厕所发现隔壁公司的秘书Connie在不停和最后一格的人说话，当时没有留意。之后女厕内突然传来一声尖叫，当众人赶到时，Connie已经在厕所上吊自杀身亡，她的脸上还挂着一个奇怪的笑容。