老师一边讲课一边在黑板上写字

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."Death is not a matter for one person. Statistics show that a person's death will radiate to 50 people including relatives and friends. The dying need to deal with all kinds of social relations, including handling inheritance and saying goodbye to their families. This is a social event." He Yihe said. Having an incurable disease is not a matter for one person, but an incurable disease for a family.Red yellow: plum, peach, onion, lotus, litchi, marigold(four) the amount of illegal is relatively large;　　一直被人类囚禁的「三尖树」们获得了自由，它们开始在这个星球表面四处游荡－－带着它们致命的毒刺，还有对人肉的「嗜好」。「三尖树」的数量与日激增，人类面临灭顶之灾。在这个关键时刻，Bill Masen博士挺身而出，为人类的生存争取最后的希望。　　矛盾随着薇莱特的步步高升日益激化，两人的婚礼年复一年的推迟着，而正当他们两人下定决心要举行婚礼的时候，一个第三者的吻却给两人的感情制造了难以愈合的伤痕。