DDoSPedia

An Online Encyclopedia Of Cyberattack and Cybersecurity Terms

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SYN cookies

SYN cookies is a technical attack mitigation technique whereby the server replies to TCP SYN requests with crafted SYN-ACKs, without inserting a new record to its SYN Queue. Only when the client replies this crafted response a new record is added. This technique is used to protect the server SYN Queue from filling up under TCP SYN floods.

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