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When the client SYN packet arrives at the filter gateway, the SYN agent does not forward the SYN packet, but actively replies the SYN/ACK packet to the client in the name of the server. If the client's ACK packet is received, it indicates that this is normal access. At this time, the firewall sends the ACK packet to the server and completes three handshakes. The SYN agent actually replaces the server to deal with SYN attacks. At this time, the filter gateway itself is required to have strong ability to prevent SYN attacks.郑武皮肤战栗，汗毛竖起，心中激荡，似乎已经看到了一个前所未有的武侠世界。富家小姐楠宁很高兴遇见自己初中一直暗恋的学长——年轻帅气的工程师沛。当沛告诉楠宁自己的爱意并表真心时，楠宁接受了他，开心不己的沛向着楠宁求婚了。可是楠宁的爸爸江萨和妈妈达兰夫人不同意，因为他们觉得沛和楠宁的社会地位有云泥之别。沛告诉楠宁，他会证明给楠宁父母他对楠宁的真心，楠宁为此很开心。帕是楠宁的学长，爸爸颂斑和妈妈阿里是珠宝店老板，他们很伤心知道自己的儿子一直暗恋楠宁，明明帕有一个富家女友爱琳，爱琳是富豪斯利萨的女儿，爱琳对帕情有独钟，可是帕对她不上心……天帝授命守护神Akara捉拿制造四界混乱的邪恶神Oma和其军队，并将他们关进无可逃脱的Nikan天狱，守护神将钥匙的地图被分成四个部分，交给四位天将保管，并且命四位天将隐藏在人间。Kwan想要得到母亲的许可，下凡去捉拿Akin以换取她父亲的自由，母亲拒绝了，她担心女儿会有危险，但她不知道其实Natcha从小跟着父亲的师傅学习武艺和法术，师祖就笑她更像死神女儿而不是天神女儿。Natcha与好朋友淘气小丘比特下凡捉拿Akin，她们将会在人间遇到四位天将的后人，并且和他们，还有来自冥界和海洋界的帮手一起查找和守护天狱钥匙。In other words, when we enable the firewall function, the message needs to pass through the following checkpoints, that is to say, according to the actual situation, the message may pass through the "chain" differently. If the message needs to be forwarded, the message will not be sent to the user space through the input chain, but will be directly forwarded out through the forward chain and the postrouting chain in the kernel space.　　焦急的刘文庆尴尬地发现林星的身边竞多了一个自称是林星男朋友的吴晓，吴晓在宴会上不俗的表现，令林星兴奋。当林星想为此答谢的时候，吴晓也提出了一个更加荒唐的要求……Brightening mode. Contrary to the dimming mode, compare the brightness of the pixels mixed with each other, and select the brighter pixels in the mixed color to keep while the other darker pixels are replaced.