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All you investment data will be kept safe, don’t worry about it.

SYN is also one of popular DDOS attacks, although we have DDOS protection , it is effective to most of DDOS attack, I am sorry to tell you nothing is 100% perfect on DDOS attacks.

To those of your who do not know what a Distributed Denial of Service (DDoS) attack or SYN flood are, I like to give you some short explaination about it.

The SYN flood attack sends TCP connections requests faster than a machine can process them.
attacker creates a random source address for each packet
SYN flag set in each packet is a request to open a new connection to the server from the spoofed IP address
victim responds to spoofed IP address, then waits for confirmation that never arrives (waits about 3 minutes)
victim’s connection table fills up waiting for replies
after table fills up, all new connections are ignored
legitimate users are ignored as well, and cannot access the server
once attacker stops flooding server, it usually goes back to normal state (SYN floods rarely crash servers)
newer operating systems manage resources better, making it more difficult to overflow tables, but still are vulnerable
SYN flood can be used as part of other attacks, such as disabling one side of a connection in TCP hijacking, or by preventing authentication or logging between servers