SYNCOOKIE authentication problems

Abdullah Ibn Hamad Al-Marri almarrie at
Thu Jun 28 09:04:24 UTC 2007

On 6/28/07, Steve Kargl <sgk at> wrote:
> Any advice on how to isolate or avoid?
> Jun 27 18:31:19 node11 kernel: TCP: []:59661 to
> []:63266 tcpflags 0x10<ACK>; syncache_expand: Segment failed
> SYNCOOKIE authentication, segment rejected (probably spoofed)
> --
> Steve

It's too weird, I even get it in my server even I use antispoof via
pf, and I get the same msg while for the IPs in the same server.


-Abdullah Ibn Hamad Al-Marri
Arab Portal

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