syn cookies

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Ok, so to try syn-cookies, I flooded my hp linux box (2.2.12) with fake
syn packets. And sure enuf even after the queue (bypassed by cookies,
anyway) was full, a legitimate connection was allowed. But it went
something like this:

SERVER : Already SYN flooded, SYN Cookies on.

                                 S
Legit Client -----------> Server

                                    SA
Legit Client <----------- Server // Inspite of flood!!

                                        A
Legit Client ------------> Server
//connection est.

                                       R
Legit Client <----------- Server // :-( What
happened

I wold be grateful to someone who can solve the mystry of this last
reset packet for me.

Thanks!!
Aadi.

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