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3. After the "Command Prompt" window is opened, enter the command "Ping Router Intranet Address" and press Enter to detect the connection between the computer network card and the router line.痴鸡少年高至霆戏精日常刚才挖他们的祖坟，还没人出来哭喊呢。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.张良苦笑道：汉王的意思是请齐王尽快出兵，两国一同发动，彻底解决项羽。再说，正殿那边依旧人声喧哗，他听了心里十分难受。若是这个时候不明智地上去和项羽决战，受伤害的将会是自己，不仅取得不了任何的战功，反而会损失惨重。