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People have studied SYN attack prevention technology earlier. To sum up, there are mainly two categories, one is through firewall, router and other filter gateway protection, the other is through strengthening TCP/IP protocol stack protection. However, it must be clear that SYN attacks cannot be completely prevented. What we have done is to reduce the harm of SYN attacks as much as possible unless TCP protocol is redesigned.小葱见两人这样，忍不住笑了起来：又哭又笑的，旁人不知你们咋回事哩。　　五年后，这位定居巴塞罗那的作家依然炙手可热，他不得不让助手礼貌地回绝一堆盛情邀请，直到收到了一封来自距离布宜诺斯艾利斯车程七小时的家乡小镇萨拉斯的信。丹尼尔所有创作的灵感全部来自这片故土，但却已经四十年没有回乡——正像他自己所说的那样，他从未离开家乡，但也从未回归。颇让助手感到意外的是，他接受了小镇的邀请，踏上了前往接受“杰出公民”奖的旅途。乡下小房子的主人优里，正在寻找突然出现的女仆莉莉丝的真面目。Reflective attacks typically use protocols that do not require authentication or handshake, Reflection attacks need to forge the source IP address of the requested data into the IP address of the target. If the protocol used requires authentication or handshake, the authentication or handshake process cannot be completed and the next attack cannot be carried out. Therefore, the vast majority of reflection attacks are carried out using network services based on UDP protocol.众人都愕然。说到底，他虽然讨厌这个郑旻，打心眼里瞧不起他，但那不过是世家的骄傲罢了。