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新书就像一株小树苗，只有在大家的支持下，才能茁壮成长起来。打造的高质感「消防职人剧」Consider strings here.We call a collection of rules that have the same functionality a table, Therefore, we can place rules with different functions in different tables for management, and IPTables has already defined four tables for us, each table corresponds to different functions, and the rules we define cannot escape the scope of these four functions. Therefore, before learning IPTables, we must first understand the function of each table.儿该死。When we write Iptables rules, we should always keep this routing order diagram in mind and flexibly configure the rules.The responsibility chain pattern describes how requests are passed along a chain of objects. It forms objects into a chain, and the sender sends the request to the first receiver of the chain and passes it along the chain until there is an object to process it or until there is no object to process and it remains at the end of the chain.