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2. After shutting down, hold down the HOME key to keep it still, connect the data cable to the computer, and release the HOME key.忽地感觉全身被一股大力勒紧，令她透不过气来。Netflix的《维琴河VirginRiver》获续订第三季,新季为10集。张家这边一是把葫芦当死人来推论，不过被秦大夫给救活罢了。怪了……徐文长抿嘴思索道，倭寇出动多为财色。原来，他大腿骨也摔坏了，根本无法再骑马。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.