How to defense attack of the WSAAsyncSelect TCP Server ?
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How to defense attack of the WSAAsyncSelect TCP Server ?[^] The server program is attacked buy many connection, like WEB DDOS. Please Help !
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How to defense attack of the WSAAsyncSelect TCP Server ?[^] The server program is attacked buy many connection, like WEB DDOS. Please Help !
Hi, All new TCP connections begin with a SYN packet... you should use your favorite search engine to investigate a 'SYN Flood'. How To: Harden the TCP/IP Stack[^] Also... it is very difficult to protect against these attacks from the operating system... you will be better off using a high end router to limit the rate of SYN packets. Keep in mind that 'Saying No' consumes cpu cycles... and that there is technically no defense to a massive DDOS. The best defense is to unplug the network cable. :) Best Wishes, -David Delaune [UPDATE] Your problem has nothing to do with SYN Floods or DOS attacks... your source code has some serious problems.