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5.4 Pad description:Physical Attack +34Step 1 Read the informationTacit knowledge is explicit: Tacit knowledge is knowledge that enables people to use concepts, facts and procedures to solve practical problems. Also commonly referred to as strategic knowledge.However, the Batman is different. First of all, after the Batman's attack, it will hit the hero without overflow. Secondly, if the Batman's attack is high enough to directly take away the opposite Batman, the assassin hero will directly attack the other hero over the Batman.If the command in the above example does not use-s to specify the original source address in the corresponding rule, After the modification is completed, The source address in the rule you modify will automatically change to 0.0. 0.0/0 (this IP represents an IP address that matches all network segments), At this time, the corresponding action of-j is REJECT, Therefore, if the original source address of the rule is not specified when executing the above command, all IP requests will be rejected (because the original source address is not specified, the source address of the current rule will automatically change to 0.0. 0.0/0). If you are using ssh to remotely go to the server for iptables setting, your ssh request will also be blocked.