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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.11. Combination Mode (Composite)Hello, mayors! At present, there are still more or less problems to be solved in our game. Please be patient and we are confident to do the game better! This post is specially used for everyone to publish reports and complaints. We will collect and deal with it regularly. Mayors are welcome to leave messages below. We will remove the reports and complaint posts published separately in the forum, please be sure to gather them in this post. Please start with slogans such as "Complaint" and "Report" and then follow what you want to express. PS: For players who report cheating in the game, please paste the screenshots of cheating cities or clubs and other information together! Thank you!5-second rule: After holding the ball, the player must throw the foul ball within 5 seconds, and FIBA rule stipulates that the free throw must also be shot within 5 seconds. 　　所以，真要论起来，这方家兄弟除了家世，其他就不大显眼了。六和塔之战后，乾隆利用红花会剪除异己，并有力地掌握了朝政大权。红花会总舵主陈家洛因思念霍青桐，只身前往维疆，遇上青桐妹香香公主，两人互相爱慕。深爱家洛的青桐只好将爱深藏心底。家洛返京后，清军重兵进疆，木卓伦被杀，青桐失踪，香香公主被俘献给乾隆。乾隆诱骗家洛劝香香公主服从自己，暗地设计将红花会首领一网打尽。香香公主力助家洛反清大业甘作牺牲，发现阴谋后自杀。乾隆设下埋伏使红花会首领全部罹难，仅家洛一人突围。为复仇，他重返维疆。