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The-F option means flush, that is, flushing the specified chain, that is, deleting all rules in the specified chain. However, note that this operation is equivalent to a deletion operation and should be used with caution when iptables rules are not saved.(1) By reusing existing threads instead of creating new threads, the huge overhead generated by thread creation and destruction can be shared when processing multiple requests.这是一部警匪动作片。剧情的发展就像其他的警匪片一样，由不同的桉子(单元)串起来。江华哥哥在剧中饰演一位非常机警、出色的警长生sir。阿生表面看起来好像是个吊儿啷噹(就是痞痞的)的人，好像什麽都不在乎。但实际上他做什麽事都比人细心、认真负责，且处处为人着想。而阿诗(陈德容饰)，也由一开始对他的憎恶，慢慢地瞭解他、欣赏他，甚至到最后爱上他... 不过碰到了感情的问题，唉～这位生sir似乎就不像他办桉那样的果决、乾脆了！最初，认为自己配不上阿诗，即使心裡喜欢嘴上也从不承认，最终......　　影片将聚焦青年叶问赴港求学及学成返回佛山的一段时间，揭晓叶问的一些谜题，例如叶问的一身好功夫从何而来。本片由叶问的童年拉开帷幕，表现其六岁入室学武，拜陈华顺为师，与其大师兄，小师妹共同生活，成长后又赴港求学拜师梁璧，最终回到佛山落地生根。没有写完六百张之前，不能休息。二十年前，一对外星父子随一颗陨石流落地球…Among them, one of the more common attacks is CC attack. It simply and roughly sends a large number of normal requests, exceeding the maximum capacity of the server and causing downtime. What I encountered was a CC attack. At most, about 20 IP addresses around the world sent requests in turn, with the number of requests per address ranging from 200 to 300 times per second. When I read the log, I felt that those requests poured in like a flood. In the blink of an eye, there were a lot of requests. In a few minutes, the volume of the log file increased by 100MB. To tell the truth, this is only a small attack, but my personal website has no protection, and the server is still shared with others. This kind of traffic immediately goes offline.