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2 记忆归零SYN attack is a kind of DOS attack. It takes advantage of TCP protocol defects and consumes CPU and memory resources by sending a large number of semi-connection requests. SYN attacks can not only affect hosts, but also harm network systems such as routers and firewalls. In fact, SYN attacks can be implemented as long as these systems turn on TCP services no matter what systems are targeted. As can be seen from the above figure, the server receives the connection request (syn=j), adds this information to the unconnected queue, and sends the request packet to the client (syn=k, ack=j+1), then enters the SYN_RECV state. When the server does not receive an acknowledgement packet from the client, it retransmits the request packet and does not delete this entry from the non-connection queue until the timeout. With IP spoofing, SYN attacks can achieve good results, Typically, clients forge a large number of non-existent IP addresses in a short period of time, SYN packets are continuously sent to the server, and the server replies to the confirmation packets and waits for the confirmation of the customer. Since the source address does not exist, the server needs to continuously resend until it timeout. These forged SYN packets will occupy the unconnected queue for a long time, normal SYN requests will be discarded, the target system will run slowly, and in serious cases, the network will be blocked or even the system will be paralyzed.1911年，古老的华夏大地迎来了最重要的时刻，辛亥革命掀开了历史的新篇章，然而却有袁世凯（梁冠华饰）倒行逆施，攫取革命胜利果实。为了肃正视听，袁更刺杀了国民党政治领袖宋教仁。随后，袁在二次革命中挫败孙中山和黄兴，终于成为了独掌大权的大总统。与此同时，为了网络民心，袁世凯宣云南都督蔡锷（王志飞饰）赴京上任。胸怀救国救民理想的蔡锷却未想到自己落入了危机四伏的政治泥潭：袁世凯对其且用且防；段琪瑞（陈逸桓饰）磨刀霍霍、步步紧逼；袁克定（李帅饰）则如幽灵一般监视着他的一举一动。看似若不经风的蔡锷，势将担起拯救中华的重任……影片改编自漫画家阿桂（桂华政）的经典畅销漫画《疯了！桂宝》，讲述了桂宝和朋友们来到四川三星堆开启全新的穿越时空的探险之旅的故事开启的一段穿越时空幻想、探秘三星堆世界的欢乐冒险故事。不过，为了让他得个教训，免得他长大后恣意妄为，这次大火中受灾百姓的损失由他赔偿。Three-man four-legged leggings race风华房地产公司财务部总监苏野美神秘失踪，与此同时，该公司因为尔债而被债权方熊斗推上法庭，总经理邵青云拒不出庭，并离家出走消息沓无，风华公司败诉，法院怀疑邵青云与苏野美有共同诈骗罪嫌疑而下了逮捕令，将闻风而逃的邵青云在机场抓住。邵青云的妻子夏飞雪不相信自己的丈夫与苏野美同流合污，与暗暗深爱自己的风华公司律师马长辉决定去苏野美的老家广州寻找其踪迹。然而他们却没想到自己的一举一动，都在另一个神秘人物的视线中。而熊斗的被杀，更令有杀人嫌疑的夏飞雪在警方的追踪中，无处可藏。夏飞雪想抓住逃匿的苏野美，证明自己最亲者的无罪！然而，她大错特错！当她义无返顾地要求寻找苏野美，在经历了可怕的爱子被绑架事件，可叹的年轻刑警为了解救自己献出生命。可敬的伙伴身患绝症而一路同行—— 等等之后，她的证明得出了结果她惊呆了，她的行动迫使要被她证明清白的对象作出了一个个凶狠的反击！