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A TCP connection is a quad, and a connection is uniquely determined by the source IP, the source port, the destination IP and the destination port. Therefore, if C wants to forge the packet from A to B, it should fill in the above-mentioned IP header and TCP header with the source IP, source port, target IP and target port. Here B is the server, IP and port are open, A is the target we want to attack, IP certainly knows, but the source port of A is not clear, because it may be randomly generated by A. Of course, if we can find out the rule of generating source port for common OS such as Windows and Linux, we can still do it. In addition, we can step on the connection port of Car A through a large number of controlled hosts.Beast is a beast; ElfBeast Elf Beast; OrcBeast is a demon beast.32. The functional departments of the Company's organs have changed their working ideas and work style. In the future, Relevant departments can make one phone call clear and do not make two calls, Can a notification contain not many notifications, Can coordinate at a meeting and not open twice, Can personally go down to the front line to collect materials, Relevant issues do not call for materials. No matter who does anything, they should pay attention to the procedures and rules. They should not stick to the end, add chaos to the front line, really reduce the burden of front-line work, really establish the idea of serving the front line, and really let front-line personnel concentrate on the management work and complete the lifeblood sales work of the company.若是没成亲，则必定会跟他解释：在下还没成亲呢，哪来的林大嫂。1有人说，前世五百年的回眸才换来今生的一次擦肩而过，那么，像张家和胡家这样的仇恨，又是怎样得来的呢？前者是情缘，后者则是孽缘。是逃脱，还是同流合污，他面临着痛苦而危险的选择……