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If an attacker sends SYN packets quickly with their own undisguised IP address, this is a so-called direct attack. This attack is very easy to implement because it does not involve spoofing or modifying packets below the user layer of the attacker's operating system. For example, he can simply send many TCP connection requests to implement this attack. However, for this attack to work, the attacker must also prevent his system from responding to SYN-ACK packets because of any ACK, RST, or ICMP (Internet? Control? Message? Protocol) will cause the server to skip the SYN-RECEIVED state (go to the next state) and remove the TCB (because the connection has been successfully established or recycled). Attackers can do this by setting firewall rules, causing the firewall to block all packets (except SYN) to reach the server, or causing the firewall to block all incoming packets so that SYN-ACK packets are discarded before reaching the local TCP handler.
故事讲述孤寡大半辈子的丁奶奶含辛茹苦拉扯大的两个独生子如龙、如虎都已过不惑之年。忠厚、善良又有些软弱的建筑工人如虎，为了老母和三个孩子，在妻子死后多年，依然孤身一人照顾全家。
中国的战国时代是世界人类史上最辉煌的一页，《东周列国·战国篇》以恢宏的气势，再现从三家分晋到秦始皇一统山河的二百多年中，诸子百家纵横捭阖、战国七雄逐鹿中原的浩瀚场面。《东周列国·战国篇》通过精心收集考证，复原了两千多年来流传的有关战国时期的典故，如“孙庞斗智”、“商鞅变法”、“田单复国”、“苏张纵横”、“窃符救赵”、“吕氏春秋”、“荆柯刺秦”等经典故事，让观众在回顾历史的同时领略中华民族古文化的深刻内涵和华夏文明的精神之根。
Ahem, the meat is still brewing. There will be meat at 12 o'clock at the latest.
边塞长大的太尉之女桑祈为了完成哥哥遗志，因一场荷包之约，进了国子监成为史无前例的唯一女弟子，跟清冷傲娇司业晏云之从师生斗法到情投意合，携手读书习武，查旧案锄奸佞，最终阻止了桑祈的青梅竹马、腹黑公子卓文远的阴谋，保家卫国，并实现了国子监广开门庭男女平权读书的理想。
当他苏醒过来，才发现自己已被一群猿人团团包围，并被带往丛林更深处的猿人部落，与其它人类关在一起，里欧才惊觉这是个由猿人统治的星球，而人类已沦为次等种，打破人类一向自以为是宇宙中心的想法……
京都府警科学搜查研究所的法医研究员？以榊マリコ（泽口靖子饰）为中心的有着千丝万缕怪癖的研究员们，以法医、物理、化学、文书鉴定等专业技术为武器，挑战查明事件真相的电视剧《科搜研之女》。今年2021年，第一部电影作品也公开了的本作品的『season21』10月开始！持续更新现行连续剧最多系列记录的科学搜查推理剧的最高峰将使其历史“再启动”，进而向更高一层的舞台迈进。
因一次飞机上的意外，一个掌握惊人解锁技巧的冷漠男人引起了女刑警秦左漫的注意，在一次诡异的密室杀人案件中，秦左漫意外发现他竟是公安大学新聘请的安全专家木夏。随着千奇百怪的密室案不断涌现，一根筋的“大小姐”秦左漫、闷骚的“技术宅”木夏、脱线的“网红”小警察谭佑，这支欢喜冤家三人组，一次次迎接不可能的挑战，一一开启上锁的房间，而被锁闭的真相也被逐渐揭开……
在12岁生日那天，薇拉·沃德收到一份猫咪礼物，为她的密友们打开了一个充满魔法、会说话的动物和众多新奇事物的世界。
"I personally feel that there is still a little luck in this, After breaking up the colony, For a few more minutes, I don't know, Because this is the first time I have met such an 'opponent', No one has experience, Anyway, one is counted as one, It is true that there is no end to shooting with guns. Fortunately, there were flamethrowers prepared to counter the impact on the position at that time. The model I remember was 74, At that time, it was still a relatively new model. In terms of performance, The direct firing distance of '74-jet' (abbreviation of 74-type flame thrower) is about 50-75 meters. If the soldiers who operate it are not specially trained, Generally, only straight-line targets can be hit, It's a little bit of a slope, But in the hands of specially trained veterans, '74 Jet' can fire into that air, Although the range is much less than that of direct shooting, Only 25-30 meters, But after all, he didn't take it to the plane, It is used to deal with enemies in low-rise buildings in street battles. Therefore, it is enough, but it is quite dangerous to spray high-altitude targets with flamethrowers. After all, the fuel sprayed out is liquid. Once the distance and wind direction are not grasped well, it is easy to let the fuel sprayed out fall back again. If it accidentally splashes on oneself, it is really a "fire".
In the above figure, using the-A option, It means "adding rules" in the corresponding chain, and-A means append, so-A INPUT means adding rules in the INPUT chain, while the-I option used in the previous example means "inserting rules" in the chain. As you must understand, their original intention is to add a rule, but-A means adding rules at the end of the chain, and-I means inserting rules at the beginning of the chain.
武林豪杰们为了各自的目的都来到了渤海之滨面见退隐江湖的“天下第一剑客”的紫衣侯。与宝玉走散的王巅之女珠儿在一座破庙中遇到了无意间被一小孩刺伤的大藏，一路相处下来，两人渐渐有了说不清的感觉。
1. The singleton pattern is simple to understand, but it is still difficult to implement it.
在文化街派出所管区，文艺团体林立，商贾小贩云集，各类批发市场众多，昔日高雅去处的文化街现在成了鱼龙混杂的闹市，独特的地理位置，使这个地区的治安状况日超复杂。
"E-commerce" takes care of many shops and accounts at the same time, saving equipment and switching costs.
世间传言解差和狱卒最心鄙狠毒，皇帝为锻炼络桑，密旨把他下狱，随囚发配边疆，沿路受尽折磨欺凌，以锻炼他忍辱挨苦的坚韧。后又以络桑作靶，展开蒙古式猎杀，百里之内，能获络桑首级者，重赏奖励。于是络桑在生死一发中逃命，以训练他死里求生的机智和愤机反抗的杀机，再以他挚爱激发他奋起争斗的野性，而蓄聚他不屈不挠的意志。最后挚爱被杀，络桑濒临疯狂，击杀情敌和叛国首恶，而通过试炼，被皇帝颁赐“金搏虎”美誉。 带刀闯关(三集) 豫亲王府的飞雪郡主被追杀，首谋竟是王府总管罗冲，内中牵涉非外人能知晓。偏偏奉旨进京的金搏虎无意间搅进事件中。金搏虎基于抑强扶弱的心理帮助救援飞雪，也成为凶徒群起追杀的目标。一路惊险艰窘，生死须臾，因而和飞雪建立相互依赖的情义。络桑痴情的挚爱的爱侣尸骨未寒，不可能移情别恋，所以纵是落花有意，流水却无情，飞雪富贵娇女，自尊受损。难免怒容恶声相对，金搏虎把情和义划分界限，坚不逾距，飞雪虽恨，却也衷心景仰他的志节，和对爱情的坚贞。
麦香是江南水乡长大的姑娘，因为出生在一个军人世家，对军人之荣誉有着特殊的感情和追求，以至于作为谈婚论嫁的一个条件。不料青梅竹马的恋人云宽突然复员，两家人又有宿怨，导致麦香和云宽的感情没有结成正果。麦香与参军的金天来结了婚，婚后生了女儿金凤。父母离世，麦香独自扶养两个年幼的弟弟和女儿，并在大雁河上当渡娘，养鸭子。后来丈夫又在部队牺牲，麦香又因误会，陷入一系列风波，四邻的闲言碎语，女儿的怨恨，弟弟的不解，使麦香的生活笼上了一层阴影。而她与云宽的爱情，也在起起伏伏中，历经坎坷与磨难。孩子们长大了，麦香又在对荣誉的重新解读中找回自己，在大雁河畔大展身手，成了远近闻名的乡镇企业家。她不仅找回了自己，也找回了亲情，并最终和云宽走到了一起。
