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It is very convenient to detect SYN attacks. When you see a large number of semi-connection states on the server, especially the source IP address is random, you can basically conclude that this is a SYN attack. We use the netstat tool that comes with the system to detect SYN attacks:到底将这个东西送给谁？或许不想让西楚国南部边疆受到威胁。一部性感的磨房/动作/喜剧电影，得克萨斯州的一个小妓院被一伙盗贼抢劫。女士们不会善罢甘休，以性和暴力方式将他们一个接一个地干掉The other is a disguised ACK packet that responds to SYN-ACK to reach the server through firewall/proxy. This disguise prevents the TCB of the server from staying in the SYN-RECEIVED state, thus ensuring free space in the backlog queue. The firewall/proxy will stay and wait for a period of time. If the correct ACK of the connection initiator is not detected, it will pass through the disguised TCP? The RET message causes the server to release the TCB. For legitimate connections, packet flow can continue without the influence of firewalls/proxies. This method is more attractive than the above method of disguising SYN-ACK, because the firewall/agent does not need to directly participate in the connection after the legal connection is established.In other words, if you hit the back water with a gun, the final damage will be reduced by 60%. . .韩信历尽千难万险，一路跋山涉水，亲自走了一趟尹旭所言的陈仓小道。这娃儿……太调皮了，一眨眼的工夫，就跑没影了。