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A5.1. 2, 1 External ear, tympanic membrane.田遥见他们兄弟一齐开口，板栗说的话尤其难以驳回，黄豆又这般调笑，急怒之下冲口而出：我爹就没娶媳妇，不是一样生了我。Jim Acosta, a CNN reporter whose "White House Pass" was revoked last year, also angrily tweeted that Trump ordered Russian reporters and Chinese reporters, but did not order White House reporters.然而，这将注定不是一条平坦的道路，在无尽的失败和不断的挫折面前，清岑幸运的遇见了正直善良的段天朗（韩栋 饰）、徐庆伦（姜黎黎 饰）等人，他们亦师亦友，在清岑最需要帮助的时刻向她伸出援手。在此过程中，清岑和段天朗之间碰擦出了爱情的火花，然而段天朗出生于富贵之家，肩上责任重大，门第悬殊的两人，能否最终修成正果？Disk.startup ();In addition to solving the port problem of A, the serial number problem also needs to be paid attention to. The serial number corresponds to the sliding window. The fake TCP packet needs to be filled with the serial number. If the value of the serial number is not in the sliding window of B when it is sent to B before A, B will actively discard it. So we need to find the serial number that can fall into the sliding window between AB at that time. This can be solved violently, because the length of a sequence is 32 bits, and the value range is 0-4294967296. If the window size is like 65535 under Windows I caught in the above figure, I only need to divide, and I know that at most I only need to send 65537 (4294967296/65535=65537) packets to have a sequence number fall into the sliding window. The desired value can be calculated quickly by exhaustion on multiple control hosts.In order to prepare a zero-based environment, we will empty the rules provided by default in centos6 so that we can carry out experiments and use the iptables-F INPUT command to empty the rules in the INPUT chain of the filter table. Later, we will summarize the relevant commands for clearing the rules separately, and there is no need to struggle with this command here.