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The SYN-Flood attack is currently the most common DDoS attack on the network, It is also the most classic denial of service attack. It takes advantage of a defect in the implementation of TCP protocol. By sending a large number of attack messages with forged source addresses to the ports where the network service is located, it may cause the half-open connection queue in the target server to be full, thus preventing other legitimate users from accessing. This kind of attack was discovered as early as 1996, but it still shows great vitality. Many operating systems, even firewalls and routers, cannot effectively defend against this kind of attack, and it is very difficult to trace it because it can easily forge the source address. Its packet characteristics are usually that the source sends a large number of SYN packets and lacks the last handshake ACK reply of the three handshakes.3. On the basis of satisfying 1 and 2, start to clarify the specific direction of SOC. Whether you pay attention to the security of the internal network, or worry about the attack of the external network, or care about information leakage, or asset control, or worry about the difficulty of preventing domestic thieves, etc., all need you to explore step by step. Generally speaking, with the source, what needs to be done is to implement it step by step.没有想到启明上线不过一年多，就有了千万盟。杨寿全愣了一下，自己跟这千户最多也就几面之缘，怎么就成老弟了。一个雨夜，姐姐（ともさかりえ饰）来到妹妹的公寓为其庆生，妹妹的男友（岡田義徳饰）开了门，可他扭曲的表情和古怪的举止不禁引起姐姐的怀疑，这时电视里开始播放“雨夜屠夫”的新闻……"The corporate communications department currently forbids us to discuss the specific situation with the media. High-profile publicity may lead to the company becoming the target of more attackers," said a security chief of a financial services company in the southeastern United States.Application Method