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| *AX SOFT>>>Security |
Why does this keep appearing? |
An IP keeps getting blocked from my firewall. Two of them actually. They are 195.10.34.40 and 89.149.169.67 The thing that it keeps blocking is called a "SYN ACK" What is this and what does it mean? Websites you blocked. From wikipedia: "A SYN flood is a form of denial-of-service attack in which an attacker sends a succession of SYN requests to a target's system. When a client attempts to start a TCP connection to a server, the client and server exchange a series of messages which normally runs like this: The client requests a connection by sending a SYN (synchronize) message to the server. The server acknowledges this request by sending SYN-ACK back to the client. The client responds with an ACK, and the connection is established. This is called the TCP three-way handshake, and is the foundation for every connection established using the TCP protocol." The IPs are being blocked, so no problem. I believe SYN_ACK is a networking threat. I'm not sure, but I believe it to be a backdoor. Well, if your firewall keeps on blocking them, do a full virus scan and see if that works. |
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