A method and device for preventing tcp insertion denial of service attack
A denial of service attack and plug-in technology, applied in the field of Internet transmission, can solve the problems of protocol principle attack and failure to consider, and achieve the effect of ensuring reliability
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[0028] At present, the TCP insertion denial of service attack needs to meet three conditions: 1) the attacker must be able to monitor all the TCP communication data packets between the client and the server; 2) the attacker can write his forged data packets to the network 3) According to the requirements of the TCP protocol, if a TCP connection receives the RST end packet sent by the other party, this connection must be closed.
[0029] Such as figure 1 As shown, we analyze the TCP insertion denial-of-service attack. First, let’s look at the process of ending the connection normally initiated by the client. The TCP connection should be closed without sending any notification.
[0030] Such as figure 2 It is a TCP communication process of a normal communication packet. The data packet No.7 in the figure is the RST packet initiated by the client (the TCP data packet is marked as AR). After the data packet is sent, the TCP connection is directly closed.
[0031] Let's take a ...
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