The principle is that syn messages are first responded to syn_ack by DDOS protection system. With a specific sequence number (recorded as a cookie). The real client returns an ack and the Acknowledge number is cookie+1. The fake client will not respond. In this way, we can know that the clients corresponding to those IP are real and add the real client IP to the white list. The next access passes directly, while other forged syn messages are intercepted. The following is a schematic diagram of protection:? 父母遭遇车祸，Elena（妮娜·杜波夫 Nina Dobrev 饰）和弟弟Jeremy搬去与唯一的监护人阿姨Jenna一起生活。在好友Bonnie、Caroline的帮助下，Elena的生活步入正轨，而Jeremy则用毒品来麻痹内心的伤痛。新学期开始，学校来一个英俊的转校生Stefan（伊恩·萨默海尔德 Ian Somerhalder 饰），他和Elena彼此一见倾心，但心底也埋藏着一个黑暗的惊天秘密——他是个吸血鬼。在Elena还不能完全接受真相时，Stefan的吸血鬼哥哥Damon（伊恩·萨默海尔德 Ian Somerhalder 饰）也不期而至，而他的出现也带着不可告人的目的。此时Bonnie也告诉Elena一个秘密——她其实是一个女巫。吸血鬼、女巫，平静的小镇生活即将被打破二十一集电视连续剧美国，一个淘金的梦。 这是一个经典的、关于北京人在纽约奋斗与挣扎的生存故事。东西文化的碰撞引起的不只是疼痛、无助与彷徨。在家庭的分解与重组中，在婚外情的发生和发展中，在移民子女的教育及两代人的观念冲突中，这群怀着美国梦的北京人，事业与情感发生着巨大的变化。 这是第一部全面描写赴美移民浪潮中北京人的故事。北京音乐家王启明与妻子郭燕，怀着对美好生活的渴望。终于来到了神往以久的美国。然而，一切并不完全象他们想象中的一样美好。通过奋斗，王启明终于成为一位富翁，但却付出了巨大代价。妻子郭燕成为外国商人大卫的妻子崦大卫却是王启明最大的竞争对手，情感与来在复杂而微妙的冲突中发展，王启明也找到了聪慧美貌的红颜知已阿春，但是矛看并不能得以很好的解决，女儿宁宁的到来，又在几个人的生活中掀起轩然大波。宁宁不能理解父亲王启明与母亲郭燕，更不能接受阿春。处身于美国的社会环境，她变得任性和反叛，以放纵自己的方式表达对父母的怨恨。 《北京人在纽约》折射出东西文化的差异，全景式展现北京人在纽约Fu Confucian Temple is located in Pan Palace, Zhongshan Road, Licheng District. Founded in the early years of Taiping and Xingguo in the Northern Song Dynasty (976 A.D.), it moved back to other places. Daguan moved back to its original place for reconstruction in the third year (1109 A.D.). The existing building still remains the original appearance of the early Qing Dynasty. It is the largest existing Confucius Temple in China and was listed as a national key cultural relic protection unit by the State Council in 2001. The main building, Dacheng Hall, is the main hall for offering sacrifices to holes. It has seven rooms in width and five rooms in depth. It is a typical Song Dynasty double-eaved temple style, with a beam-lifting wooden frame, overlapping arches, vertical and horizontal beams, and carved with little dragons, birds and animals, flowers and vegetation. The pillars of the temple are all stone, with a terrace in front, a handrail on the wings, and a tunnel on the lower side to worship the court. Panchi outside the court is built with a stone bridge of Yuan Dynasty. The bridge deck is paved with 72 rectangular stones, representing 72 of Confucius' favorite pupils. The east and west are two verandahs, the front is Dacheng Gate and Jinsheng Yuzhen Gate. Minglun Hall on the east bank is the main existing subsidiary building of Confucian Temple. The front of the hall, the open court, Panchi and the stone bridge are all well preserved. In the west, there are more than ten Pangong, Xiangxian Minghuan Temple and Zhuangyuan Temple. The display materials in the temple are very rich. In the center of the main hall of Dacheng Hall, Confucius' holy image is enshrined, and four matching and twelve philosophers are enshrined on the east and west sides. More than 500 cultural relics such as sacrificial vessels, musical instruments and relics of Quanzhou celebrities of past dynasties are displayed. Lingxing Gate is adjacent to Tumen Street. It was originally in the category of Fu Confucian Temple buildings and was later used for other purposes. In order to completely protect the Confucian Temple complex, in 2000, the Municipal Party Committee and the Municipal Government, as a key project, invested 120 million yuan to relocate the vegetable market and three enterprises and institutions to build the Confucian Temple Square, which not only effectively protected the site, but also became a place for citizens to relax and exercise.绝大多数的人认为从事广播电视事业的人，特别是在电视剧制作部门工作的人是不讲伦理道德的异类，可是实际上在那里工作的每个人都是非常平凡的，他们和其他人一样需要爱、理解，认可和关心。Little Charlie nodded seriously.
