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The advantages of using policy mode are as follows:还有鸭血粉丝汤，放了香荽也香。国公夫人跟田夫子有仇，就不想让他好过。1. CPU: Pentium 3 (P III) or above configuration (Pentium 4 or above configuration is recommended).If you want to buy a one-day ticket, click on the red box in the lower left corner and choose the ticket you want.　　一个对年轻律师和女主编来说本应该清新的早晨，却成了世界末日，到死都忘不掉。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.