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.
There is a key point here. Once you get on the CDN, don't disclose the IP address of the source server, otherwise the attacker can bypass the CDN and directly attack the source server. All previous efforts are in vain. Search for "bypassing CDN to obtain real IP addresses" and you will know how rampant the domestic black industry is.
Analysis, on the other hand, is to conduct a more detailed study of the contents of a class and find their subtle and accurate differences so as to have a deeper understanding of things. It is a comprehensive ability to see that some of them have more connections and more common points from the numerous and complicated large number of things, so that they can be summed up together to make the large number of things that were originally scattered form systems and categories.
由Mike Bartlett创作和编写，由戏剧共和国制作，生活明星Alison Steadman, Peter Davison, Adrian Lester, Victoria Hamilton, Melissa Johns, Rachael Stirling, Saira Choudhry, Erin Kellyman, Calvin Demba和Joshua James，他们都出现在今天的新形象中。维多利亚·汉密尔顿(Victoria Hamilton)将继续出演她在《福斯特医生》中扮演的角色——现在的名字是Belle，而不是安娜——并寻求重新开始自己的生活。亚当·詹姆斯(Adam James)将在稍后的剧集中出现，继续扮演他的福斯特医生(Doctor Foster)角色，饰演贝尔的前夫尼尔(Neil)。《生活》也有伊莱恩·佩姬和苏珊娜·菲尔丁的关键角色。故事以曼彻斯特为背景，讲述了一幢被分成四套公寓的大房子里的居民的故事。随着这四个故事以令人惊讶的方式展开并交织在一起，它们讲述了一个更大的故事，讲述了当我们走出自己的私人空间，近距离观察别人的生活时会发生什么。生活探索着爱、失去、出生、死亡、平凡、不平凡以及两者之间的一切。盖尔(艾莉森·斯蒂德曼饰)嫁给了亨利(彼得·戴维森饰)，她正准备庆祝自己的70岁生日，一次偶然的相遇让她的一生陷入了疑问。大卫(艾德里安·莱斯特饰)和凯莉(瑞秋·斯特林饰)结婚很幸福，但是当他在假期遇到冲动的赛拉(赛拉·乔杜里饰)时，他被诱惑所困扰。普拉提老师贝尔(维多利亚·汉密尔顿饰)井然有序的生活被她15岁的外甥女玛雅(艾琳·凯利曼饰)的意外到来打乱了。怀孕的汉娜(梅丽莎·约翰斯饰)和安全稳定的利亚姆(乔舒亚·詹姆斯饰)幸福地结合在一起，但她的计划却被安迪(卡尔文·登巴饰)的回归打乱了，9个月前她和安迪有过激情的一夜情……
2. You must first sign up for Nanjing Social Security Training (the training duration is 1 hour, please sign in on time) before you can apply for the CA certificate. The clerks registered on Nanjing Social Security Website, the trainees and the CA certificate managers must be the same person (other people can also bring the relevant certificates of the clerks and enterprise information to handle the CA, and the managers on the application form still fill in the clerks themselves).
为香港电视广播有限公司拍摄制作的时装爱情剧电视剧，由罗天宇、龚嘉欣、王敏奕、谢东闵及菊梓乔领衔主演，并由石修、龚慈恩及蒋家旻联合演出，编审何静怡，监制林肯。
《我最爱的女人们》是一档主打代际关系的明星旅行真人秀节目，由明星带着老婆和老妈一起旅行，从轻松愉快的角度解读家庭成员之间的微妙关系。
程胜（周星驰饰）乃一游手好闲之徒，终日坑蒙拐骗，无恶不作。一日装瞎子行骗，遇遇女骗子（毛舜筠饰）被追债的贵利王打手排骨（元奎饰）欺负，胜一时看不过眼出手相救，不料却被债务转嫁弄了自己一屁股债。另一方面。老江湖凌万蜂（午马饰）同样欠下了贵利王（张耀扬饰）的债务，无力还清。他想办法找到自己的旧情人萍姐（恬妞饰）和妓女APPLE（叶子媚饰）合谋冒充一富户人家向一阔少诈骗。不料被骗的阔少正是胜所扮，他也想骗这一富户。阴差阳错的骗局，笑料百出...
故事发生在20世纪初，出生于福井秋山家的次男笃藏（佐藤健 饰）并不像哥哥（铃木亮平 饰）那样成为令人羡慕的律师，他鬼点子多多，却干什么都没有长性，令父亲周藏（杉本哲太 饰）。好不容易给他说了一个上门女婿的亲事，起初还任劳任怨并且和妻子俊子（黑木华 饰）情投意合的笃藏，终于不满平凡无聊的生活，转而跟随军队的田边军曹（伊藤英明 饰）学起了料理，更不惜和岳父决裂跑到东京学习料理。在此期间，宇佐美（小林薰 饰）、五百木（加藤雅也 饰）等人的出现推动着笃藏命运的改变。他专心修炼料理技术，朝着光辉的未来前进……
Stephen was afraid of silence for the first time. The empty sanctuary could even hear his crazy heartbeat. He raised his hand and drew half a circle in the air. Then he sighed and put his hand down. "No, Stephen, you shouldn't do this... shouldn't..." He felt that he was like a lost dog now and was at a loss.
Lin Shao: "You should press to death directly, and you should not take pains to hit this 18-line face."
“小王子（党卫军）”，由彭茂熙编导。
一艘宇宙飞船坠落地球，正在执行军事任务的狙击手奎因·麦肯纳（波伊德·霍布鲁克 饰演）恰好遭遇外星人并发生激战，侥幸逃脱的他捡到了外星人的装备并寄回了家想再做他用。传说这种被称为铁血战士的外星人曾数次光临地球，使用各种残忍的手段对人类进行猎杀游戏。而这一次，奎因的儿子罗里 收到包裹后意外触发机关，引来了更强大的终极铁血战士降临地球。而想要阻止其大开杀戒的却是一群问题士兵和一位生物科学家凯茜·布拉克（奥立薇娅·玛恩 饰演）。事情却远不像他们想象的那样简单，一场铁血、终极铁血与人类之间的三方猎杀大战正式拉响！
一个16岁的女孩从夏令营回到家，得知她的母亲有了一个新的男朋友，她打算嫁给一个男人，他的魅力，智慧和美貌使他看起来不像人类
DDoS attacks are divided into three layers: attacker, master and agent, which play different roles in the attacks:
从小和奶奶一块长大、乐观自信的林佑开，在26岁获得锁王争霸大赛的冠军，登顶成为新一代锁王，但就在颁奖现场，他的女友埃拉带着警察出现在现场，指证阿开正是自家保险柜失窃案的嫌疑人。埃拉是著名安保集团龙氏锁业的老板龙啸坤的小女儿，事发当晚，龙家只有埃拉和阿开，而龙家监控摄像头拍下了阿开开锁的全过程，而只有阿开知道，这本是他和女友一次打赌，赌他是否能在30分钟内把埃拉家的锁全部打开。阿开怀疑自己陷入一场阴谋中。埃拉却认为阿开接近自己另有所图。最令人惊奇的是，龙啸坤却向警方宣布他的保险箱其实空无一物，他并没有丢失任何东西，而他的大女婿却刚刚雇人从他的保险箱里拿到了价值千万的财物。
