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This article discusses each type of attack in turn, provides specific examples, and discusses possible mitigation methods.So at the moment, We're on another machine, Use the ping command to send a message to the current machine. As shown in the following figure, the ping command can be responded to, proving that the message sent by the ping command has been normally sent to the host where the firewall is located. The IP address of the machine where the ping command is located is 146, and the IP address of the host currently testing the firewall is 156. We will use this environment to demonstrate the operation of iptables.Click on the green box of "Manaka" (the one-day ticket in the above picture is now updated to the 24-hour subway ticket, see the following subway ticket introduction for details)Macro commands are a set of commands. By executing macro commands, one batch of commands can be executed at a time.1, No reading, study habits没办法，和开始一起生活的邪神“百合”