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After the INPUT chain is emptied, there are no rules for the INPUT chain in the filter table, but it can be seen that the default policy of the INPUT chain is ACCEPT, that is, the INPUT chain "releases" all messages sent to the local machine by default, accepts all messages when there are no rules, and releases messages by default when the messages are not matched by any rules.迷拉星的英雄之子卡卡，身体被邪恶力量入侵，随着少年长大，这份力量也在酝酿着毁天灭地的灾难，却又在冥冥之中指引着守护的道路……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.Episode 29这一天，西班牙将进入历史性的一刻：结束了与穆斯林军队持续数十年的战争，国王阿方索十世将与穆斯林军统帅阿布巴克签订和平协议，以期恢复和平，让犹太人、穆斯林与基督徒在托雷多城下和睦共处，实现“三种文化共生”的夙愿。