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.
《我是僵尸》讲述一位变成僵尸的医学院女学生。为了能获取足够的大脑食用，以维持其基本的人性，主角找到了一份法医的工作，但她却被迫继承了这些被她吃掉的大脑中的回忆。在她的医生和一位警探的帮助下，她成功的解决掉了数起谋杀案。而随着这些案件的解决，也让她脑中那些恼人的噪音慢慢安静下来。
Public String getSubject () {
死小子，不露面就行了？媳妇都亲自找来了，看你往哪躲。
In addition to solving the port problem of A, the serial number problem also needs to be paid attention to. The serial number corresponds to the sliding window. The fake TCP packet needs to be filled with the serial number. If the value of the serial number is not in the sliding window of B when it is sent to B before A, B will actively discard it. So we need to find the serial number that can fall into the sliding window between AB at that time. This can be solved violently, because the length of a sequence is 32 bits, and the value range is 0-4294967296. If the window size is like 65535 under Windows I caught in the above figure, I only need to divide, and I know that at most I only need to send 65537 (4294967296/65535=65537) packets to have a sequence number fall into the sliding window. The desired value can be calculated quickly by exhaustion on multiple control hosts.
你当年是咋嫁给长明哥的，你都忘了？人人都说我哥比长明哥好。
在上一季结尾中House大叔被送进了精神病院，这位医神大叔在精神病院会发生什么事情呢，那就尽请期待9月21日周一晚两集联播的House。
7. Ships shall, as far as possible, avoid anchoring in or near the end of the traffic separation scheme area.
不懂事还不能训了？杨寿全虽然坐下，但气头未消，指着杨长帆骂道，这刚头一次出门，就跟兵痞送礼吃酒去了，再由着他，还不拿宅子田地去赌了？吴凌珑连忙冲杨长帆摆手，眼色不停：赶紧过来，跟你爹道歉。
警察梁大川在执行任务期间误伤人质，警方在侦破过程中发现这起案件与代号为“火烈鸟”的犯罪团伙紧密相关，由此引发的连环案件愈发扑朔迷离。在梁大川的配合下，警方围绕受害者遗言“六色魔方”展开种种猜想，神秘人“A计划”开始露出破绽。随着警方调查的深入，所有被切断的线索有了新的方向，阴谋栽赃无处遁形；在新型毒品案件背后，受害者家庭不为人知的秘密逐渐浮出水面；梁大川忍辱负重，背水一战，却牵出自己的身世之谜。警方历尽艰辛，最终将犯罪分子绳之以法。歌颂了青年警察为人民热心热肠的胸怀和气质。
在少林、武当、峨眉等各大名派尚未崛起之前，有“天下第一魔”之称的天诛教教主令狐笑正欲称霸武林，遭到有“天下第一人”之称的司马傲阻止，于是两人约战于泰威山顶，结果令狐笑被司马傲的“正直宽大”感化，双双退隐江湖......
猪肉店员田劲接到长途电话，说他在内地做生物学术研究的叔叔严星，突然过世留下了一间废置工厂。田劲到工厂感觉气氛恐怖，半夜，他辗转反侧，竟然见到一名白衣女子，田劲大惊。后来他发觉她又聋又盲又哑，而此女子秀色可餐，田劲对她有了非份之想。突然那女子瞪眼向田劲，还拔刀向他狞笑，田劲认定女子是精神病变的疯狂杀手，他被追杀，便跪地求饶。女子竟拿起刀在割自己，田劲极度恐慌，撞墙自杀。原来这是严星设计的实验，正如他所料，当田劲以为女子是鬼怪时，便惊慌惧怕。当知道女子又盲又聋又哑时，便想欺凌她。当他被追杀时，便跪地求饶。女子玉宁提议严星把田劲碎尸埋掉。没想到血流满面的田劲突然站起来向严星索命。严星被吓得死去活来。
年轻男子叫过来一名手下。
执行反攻任务的某团侦察参谋马成龙被派往敌后侦查盟军飞机失事，得到了蝴蝶小组和中共地下党的帮助。根据日军的种种迹象，马成龙判断我滇西反攻部署已被日军截获，向指挥部报告但因指挥部参谋失误导致此消息未能送抵最高长官。
为什么？英布微笑道：因为在这里，只有你这位叔叔才是真正的王。
恶人谷不应该是阴森恐怖，处处透着血腥味？为什么来到这里，竟如来到一个繁华而平静的镇市？道路上的人越来越多，这些人悠闲自在，他们谈笑风生，从武林辛秘到诗词歌赋，从酒如何酿造更加香醇到如何提高庄稼产量。
故事讲述在有中世纪欧洲风格的异世界古都阿伊特力亚，城内流传着一个秘密情报，就是在某小巷中有一间非常有特色的居酒屋「阿信」，那里的食物是其它地方都吃不到的极品美味，而且很便宜，于是懒惰的卫兵、任性的千金、严格的包税人等齐齐前往，被关东煮、炸物、海鲜盖饭等美食俘虏，其实这只是一间不知为何连接到异世界的平凡日本居酒屋…..
在那里邪神采取的行动是……！？
在孩子们的眼里， 总是有蓝蓝的天空；在孩子们的耳中，总是有美妙的音乐，在孩子们的脑海里，总是有各种各样的奇思妙想。在青青草原上，快乐的小羊们还有出淤泥而不染的小灰灰正享受着快乐的童年生活。在他们的学习生活中，总因他们的各种奇思妙想而带来种种趣事。
How do these two pair of socks look
