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After the INPUT chain is emptied, there are no rules for the INPUT chain in the filter table, but it can be seen that the default policy of the INPUT chain is ACCEPT, that is, the INPUT chain "releases" all messages sent to the local machine by default, accepts all messages when there are no rules, and releases messages by default when the messages are not matched by any rules.8. Repeat the above stages;For Ethernet, the minimum packet length data segment must reach 46 bytes, while the attack message is only 40 bytes. Therefore, the network card will do some processing when sending, filling 6 zeros at the end of the TCP header to meet the minimum packet length requirement. At this time, the length of the entire packet is 14 bytes of Ethernet header, 20 bytes of IP header, 20 bytes of TCP header, plus 6 bytes of 0 filled due to the minimum packet length requirement, totaling 60 bytes.48年目の約束 沢口靖子 風見章子《城市传说》原名《超能宝贝II》讲述地心超能力能源爆发，昏睡一年后的部分人类拥有了超能力，但没想到的是在超能力的背后竟然隐藏着一个即将毁灭地球的黑暗阴谋。与以往少儿电视剧不同的是，该剧将打破传统少儿电视剧制作理念，剧情设计偏向于成人化，力求培养观众的独立思维，提升观众及演员对亲情、友情的认知能力。1937年，热河人佟家儒（杨志刚饰）背井离乡在上海聂中丞中学教国文，养女囡囡成了残疾，本想再次南逃的他被迫留下。目睹侵略者残害同胞，他忍气吞声只求保住性命。学生欧阳（张家溢饰）为国效力，急需助手，佟家儒硬着头皮帮忙。欧阳牺牲，佟家儒暴露被日本特务东村盯上，他巧妙周旋完成任务同时摆脱了嫌疑。欧阳上司杨逍被抓，佟家儒将他救出。妻子栀子刚生下儿子希望，却因保护杨逍被杀。半年中四个参与杀害栀子的凶手均被佟家儒杀死且不露马脚。东村苦于没有证据，试图用残酷的刑具逼佟认罪。共产党人组织教师、学生游行，营救了佟家儒。三年后，佟家儒拿自己当诱饵，帮助国共两党的同志们联合除了日本特务基地。日寇投降，东村不甘失败绑架希望，逼佟家儒与其决斗。战友们制服东村，营救希望。东村大骂佟是懦夫，佟家儒告诉他：“对待侵略者，中国人都有一颗勇敢的心。