In a SYN Flood Attack an attacker sends SYN packets at a high rate to a server w

Question

In a SYN Flood Attack an attacker sends SYN packets at a high rate to a server without every completing the third
handshake (the final client to server ACK the finalizes a connection). The server allocates resources (to store connection
state information) for each received SYN and exhausts it connection resources preventing valid connections from being
made. The SYN cookie approach (RFC 4987) is an effective defense against SYN Flood Attacks because the server does
not need to allocate resources on a received SYN. For the standard TCP handshake (i.e., not using SYN cookies), exactly
what state must be stored on the receipt of a SYN

Explanation / Answer

This is the whole information on how the flood attack works and all the functionalities. Hope this helps....

Flood Attack

Flood Attack is somewhat a form of DoS attack in which the attacker is responsible for sending the SYN request to the target's system and getting it to consume enough of the server resources which in result makes the system hang out or unresponsive for the users to use.

The counter-measures that can be made to make the Flood Attack fail are as follows:

When we talk about SYN Cookies they may be the best technique in resisting the SYN Flood Attacks. The technique is basically used to make distinct choices for the initial TCP sequence numbers by the TCP servers.

The process of SYN Cookies is as follows:

Drawbacks of using SYN Cookies:

The drawbacks of using SYN cookies are as follows:

Hence,these are the SYN Flood Attack and how to resolve them using the SYN Cookies and all the drawbacks of the SYN Cookies.

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Hope this helps......

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