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That is to say, a total of false syn messages will occupy the TCP preparation queue for 63s, while the semi-connected queue defaults to 1024, which is different by system default and can be viewed by cat/proc/sys/net/ipv4/tcp_max_syn_backlog c. That is to say, sending 200 fake syn packets per second without any protection is enough to burst the semi-connection queue, thus preventing the real connection from being established and responding to normal requests. The end result is that the server has no time to ignore the normal connection request-denial of service.Poor heart function and circulation will bring about changes in skin color, especially the lips and nail bed will become pale and blue;在他还有许许多多的小错面前，这才是最大的错。In the past few years, we have seen an explosive growth in underground services aimed at helping cyber criminals create undetectable payloads, the most famous of which is FUD (completely undetectable) payloads in the secret world. These services range from test services that allow testing payloads against all antivirus software to automatic packagers aimed at confusing malicious documents in a way that makes them undetectable. The screenshot above shows two such services.Response "(https://www.usenix.org/node/197445).Basically, made up