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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.项羽续道：想当年秦国人攻陷我大楚都城，楚南公留下‘楚虽三户，亡秦必楚的豪言壮语，多少楚国将军臣子牺牲，其中就包括我的祖父项燕。高凡等人却并没有逃出生天的喜悦和欢呼，因为秦霖这一路反复折腾，已经是气若游丝，危在旦夕。剧团老板娘赵丽面临剧院即将被拆除的窘境，她四处奔波，希望能找到一条出路，让剧团大家庭免于分崩离析的命运。赵丽的侄女丹丹是剧团的台柱子，一心想去大城市打拼的她，也即将离开剧团。 剧团的未来和侄女的前途让赵丽左右为难，逐渐积累的秘密和压力让她喘不过气。面对生活中这突如其来的一切，赵丽将何去何从......The hotel as a whole is relatively simple and unsophisticated, with spacious, neat and slightly old rooms.谁知好容易回来京城，胡家却在办丧事——二婶和大哥都死了。Prunus armeniaca apricot