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When an attacker sends an http post request, he sets the Content-Length to a large value in the request header and sends the http body to the web server at a very slow speed, byte by byte. The web server always needs to maintain the connection with the client and wait for the data transmission to end. Because the content-length is set to a large value and the http body transmission speed is very slow, attackers can occupy this connection for a long time.男主是豪门继承人，小时候因母亲去世养成了叛逆狂傲的性格，后来见到女主对她一见钟情，然而当他看到父亲带回来的新妻子的女儿就是女主的时候，一腔爱意化为怒火，对女主展开各种折磨，伪兄妹的虐恋故事就此展开。Enter the flight simulator(three) to undertake business did not sign a fire protection technical service contract with the client according to law;This leads to an obvious potential DoS attack. Incoming SYN packets will be allocated too many TCB and the host's kernel memory will be exhausted. In order to avoid this memory depletion, the operating system usually associates a "backlog" queue parameter with the listening interface, which maintains both the upper TCB number of connections and the SYN-RECEIVED state. Although this scheme protects the host's available memory from attack, the backlog queue itself brings a (small) source of attack. When there is no space in the backlog, it is impossible to respond to new connection requests unless the TCB can be recycled or removed from the SYN-RECIEVE state.哈哈哈哈。有一天，小光第一次在夜里没告诉任何人就出去了。 夜风怡人，自由自在，与白天完全不同。小光发现夜晚才是他的归宿。