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.
TCP State Depletion Attack
小说和电视剧一起连载。
A three-part drama set in the trauma unit of a London hospital, a grieving father blames a high-achieving trauma consultant for the death of his teenage son.
Sun Guofu stressed, "The return on investment cycle for early events is expected to be relatively long, but at this stage, many athletes on this track have already obtained VC investment. In the next 3-6 months, it is expected that all brands of teaching products and customer acquisition routes will be basically polished and mature. At that time, products with high completion rate, good renewal rate and high proportion of word-of-mouth recommendation will be able to achieve benign and rapid growth, thus obtaining more investment. "
《难以置信》改编自 The Marshall Project 和 ProPublica 出版的普利策奖获奖文章《令人难以置信的强奸事件（An Unbelievable Story of Rape）》（作者是 T·克里斯琴·米勒和肯·阿姆斯特朗），以及美国生活（This American Life）广播剧集《Anatomy of Doubt》。本剧由荣获奥斯卡提名的苏珊娜·格兰特 和丽莎·查罗登科执导，讲述了难以言表的创伤、坚定的决心和惊人的适应能力。
The Publish-Subscribe Model in Real Life;
1. Practical Website
以动画的手法演绎梁山伯与祝英台的故事。熟悉的经典故事，不一样的表现手法。动画前半段的明媚让梁山伯和祝英台的形象不再只局限于纸张上和想象中，有了实体。可这明媚愈发衬托出后半段的凄凉。让我们跟随动画再重温这个经典凄凉的爱情故事。
上世纪九十年代，北京什刹海边槐树胡同一个普通的小四合院，住着老牛一家三口，牛德山和周二玲老两口辛苦半辈，为儿女们操碎了心，希望大儿媳早点给她们抱孙子，可总是令他们失望，婆媳关系永远困扰着老人。好心帮孙子洗尿布，还被二儿媳嫌弃，小两口合伙来骗老人。在一家人经历了那么多大风大浪之后，老人还保有那份平淡，希望儿女们幸福平安。总的说来，一家人和和气气，日子过得有滋有味，老两口盼着家人和睦，盼着人丁兴旺，用浓浓的亲情传承着那份暖人肺腑的牵挂。
…,尹旭和他们合作的共同目的是对付项羽和刘邦，为秦国和子婴，李由等人报仇
HBO喜剧《副校长 Vice Principals》第二兼最终季将在美国时间9月17日首播，9集的第二季讲述在新学期Gamby及Russell（Danny McBride及Walton Goggins饰）理解到，比获得权力更难的事，就是如何把持着权力。 本季其他演员包括Kimberly Hebert Gregory﹑Georgia King﹑Busy Phillips﹑Shea Whigham及Sheaun McKinney。
林心恬（郭采洁 饰）的爱情路一直不顺，总是不能在对的时间遇到对的人。正当她心灰意冷时，缘份使她邂逅了多情暖男吾川（郑恺 饰），吾川对心恬展开狂热追求，最终心恬被打动。然而意料之外的是，心恬自学生时期就暗恋的学霸男神黄克群（李东学 饰）又出现了。是该选择近在眼前的幸福，还是多年前梦寐以求的白马王子？当心恬做出决定后才发现，原来爱情在冥冥中早已注定！
这样的人，若不能举出有力的证据，是不能随意逼问定罪的。
3.4 Note:
粗糙不代表没用。
祝英台女扮男装去书院求学，遇梁山伯，一见如故。同窗三年，山伯不知英台女儿身。后英台因家信促其速归，留定情信物于山伯。山伯方知英台是女郎 ，两人情定三生拜高堂。无奈英台已被父母许配给马文才。多情自古多离伤 ，父母之命打鸳鸯 ，楼台相会绝情殇，化为蝴蝶飞成双……
# netstat-n-p TCP grep SYN_RECV grep: 22 wc-l 324
