TCP SYN Cookies

Onload User Guide (UG1586)

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1.2 English

The Onload environment variable EF_TCP_SYNCOOKIES can be enabled on a per stack basis to force the use of SYNCOOKIES thereby providing a degree of protection against the Denial of Service (DOS) SYN flood attack. EF_TCP_SYNCOOKIES is disabled by default. Refer to Parameter Reference for details of environment variables.