syn cookies

Dave Wreski (
Tue, 29 Jul 1997 18:17:40 -0400 (EDT)

Hi all. I'm wondering if someone could help me find information on linux
and its ability to withstand syn attacks.

I compiled support for syn and rst cookies in 2.0.31-pre2, and it seems to
hold 128 SYN_RECV connections when being attacked by the syn flood.

Can someone tell me what exactly these cookies are, and why it is that
Linux is the only one who seems to have adopted this mechanism?

Thanks for any ideas,
Dave Wreski